| Rank | Average Family Size ▼ | School District / Population |
| 1. | 3.34 | Storm Lake Community School District / 12,237 |
| 2. | 3.31 | Mid-Prairie Community School District / 9,085 |
| 3. | 3.30 | Boyden-Hull Community School District / 4,259 |
| 4. | 3.26 | Rock Valley Community School District / 4,924 |
| 5. | 3.25 | Denison Community School District / 10,419 |
| 6. | 3.24 | Sioux Center Community School District / 8,882 |
| 7. | 3.23 | Riceville Community School District / 2,667 |
| 7. | 3.23 | Davis County Community School District / 8,512 |
| 7. | 3.23 | West Liberty Community School District / 6,211 |
| 10. | 3.22 | Sergeant Bluff-Luton Community School District / 5,996 |
| 11. | 3.21 | Edgewood-Colesburg Community School District / 3,186 |
| 12. | 3.20 | Seymour Community School District / 2,273 |
| 12. | 3.20 | Postville Community School District / 3,612 |
| 12. | 3.20 | Columbus Community School District / 4,492 |
| 15. | 3.19 | Perry Community School District / 9,469 |
| 16. | 3.18 | Jesup Community School District / 5,094 |
| 17. | 3.17 | Dallas Center-Grimes Community School District / 9,527 |
| 17. | 3.17 | Waukee Community School District / 37,076 |
| 17. | 3.17 | Bondurant-Farrar Community School District / 6,275 |
| 20. | 3.16 | West Lyon Community School District / 4,519 |
| 20. | 3.16 | Wapsie Valley Community School District / 3,885 |
| 22. | 3.15 | Carlisle Community School District / 8,414 |
| 22. | 3.15 | South Tama County Community School District / 9,011 |
| 24. | 3.14 | Sioux City Community School District / 83,145 |
| 24. | 3.14 | Marshalltown Community School District / 30,561 |
| 26. | 3.13 | Diagonal Community School District / 685 |
| 27. | 3.12 | Lisbon Community School District / 3,255 |
| 27. | 3.12 | Norwalk Community School District / 11,129 |
| 29. | 3.11 | Remsen-Union Community School District / 2,989 |
| 29. | 3.11 | Linn-Mar Community School District / 36,539 |
| 29. | 3.11 | Ballard Community School District / 7,412 |
| 29. | 3.11 | Western Dubuque Community School District / 21,320 |
| 29. | 3.11 | North Polk Community School District / 6,345 |
| 34. | 3.10 | Des Moines Independent Community School District / 203,307 |
| 34. | 3.10 | Johnston Community School District / 31,193 |
| 34. | 3.10 | Treynor Community School District / 3,064 |
| 37. | 3.09 | Center Point-Urbana Community School District / 6,053 |
| 37. | 3.09 | Southeast Polk Community School District / 31,979 |
| 37. | 3.09 | Earlham Community School District / 2,924 |
| 37. | 3.09 | Lawton-Bronson Community School District / 3,308 |
| 41. | 3.08 | MOC-Floyd Valley Community School District / 10,808 |
| 41. | 3.08 | Ankeny Community School District / 49,827 |
| 41. | 3.08 | West Sioux Community School District / 4,206 |
| 41. | 3.08 | Central Lyon Community School District / 4,333 |
| 45. | 3.07 | Mount Vernon Community School District / 6,367 |
| 45. | 3.07 | Underwood Community School District / 3,930 |
| 47. | 3.06 | North Linn Community School District / 3,740 |
| 48. | 3.05 | Pella Community School District / 15,410 |
| 48. | 3.05 | Wapello Community School District / 3,768 |
| 50. | 3.04 | Adel-De Soto-Minburn Community School District / 7,832 |
| 50. | 3.04 | Lamoni Community School District / 3,077 |
| 52. | 3.03 | Glenwood Community School District / 11,146 |
| 52. | 3.03 | Murray Community School District / 1,541 |
| 52. | 3.03 | Morning Sun Community School District / 1,239 |
| 52. | 3.03 | Logan-Magnolia Community School District / 3,163 |
| 52. | 3.03 | Lone Tree Community School District / 2,461 |
| 52. | 3.03 | East Greene Community School District / 1,803 |
| 52. | 3.03 | North Scott Community School District / 15,203 |
| 59. | 3.02 | Pleasantville Community School District / 3,427 |
| 59. | 3.02 | Martensdale-St. Marys Community School District / 2,866 |
| 61. | 3.01 | College Community School District / 23,720 |
| 61. | 3.01 | Council Bluffs Community School District / 59,804 |
| 61. | 3.01 | Gilbert Community School District / 6,438 |
| 61. | 3.01 | Muscatine Community School District / 29,454 |
| 61. | 3.01 | Central Decatur Community School District / 4,283 |
| 61. | 3.01 | Winterset Community School District / 9,444 |
| 61. | 3.01 | Harmony Community School District / 2,580 |
| 68. | 3.00 | Clarke Community School District / 7,993 |
| 68. | 3.00 | Le Mars Community School District / 13,465 |
| 68. | 3.00 | Melcher-Dallas Community School District / 1,962 |
| 68. | 3.00 | Lenox Community School District / 2,106 |
| 68. | 3.00 | Van Meter Community School District / 2,824 |
| 68. | 3.00 | Pleasant Valley Community School District / 20,868 |
| 68. | 3.00 | Dunkerton Community School District / 2,566 |
| 75. | 2.99 | Andrew Community School District / 1,584 |
| 75. | 2.99 | Lewis Central Community School District / 15,299 |
| 75. | 2.99 | Mount Ayr Community School District / 4,180 |
| 75. | 2.99 | North Mahaska Community School District / 2,945 |
| 75. | 2.99 | Collins-Maxwell Community School District / 2,751 |
| 75. | 2.99 | Tri-Center Community School District / 3,635 |
| 75. | 2.99 | Louisa-Muscatine Community School District / 4,280 |
| 75. | 2.99 | Hinton Community School District / 3,045 |
| 83. | 2.98 | Northeast Community School District / 3,041 |
| 83. | 2.98 | Sheldon Community School District / 7,323 |
| 83. | 2.98 | Williamsburg Community School District / 6,131 |
| 83. | 2.98 | Interstate 35 Community School District / 4,599 |
| 83. | 2.98 | Urbandale Community School District / 20,971 |
| 83. | 2.98 | Benton Community School District / 9,140 |
| 83. | 2.98 | Davenport Community School District / 106,742 |
| 83. | 2.98 | Winfield-Mount Union Community School District / 1,910 |
| 83. | 2.98 | South Winneshiek Community School District / 4,361 |
| 83. | 2.98 | Woodward-Granger Community School District / 5,052 |
| 93. | 2.97 | Dike-New Hartford Community School District / 4,338 |
| 93. | 2.97 | Dubuque Community School District / 75,725 |
| 93. | 2.97 | Central Clinton Community School District / 9,293 |
| 93. | 2.97 | Ar-We-Va Community School District / 2,099 |
| 93. | 2.97 | Knoxville Community School District / 11,461 |
| 93. | 2.97 | Indianola Community School District / 19,742 |
| 93. | 2.97 | Solon Community School District / 6,168 |
| 93. | 2.97 | Van Buren Community School District / 5,370 |
| 93. | 2.97 | Oelwein Community School District / 9,134 |
| 93. | 2.97 | Woodbury Central Community School District / 2,851 |
| 93. | 2.97 | Union Community School District / 6,214 |
| 93. | 2.97 | Malvern Community School District / 2,003 |
| 105. | 2.96 | West Des Moines Community School District / 64,104 |
| 105. | 2.96 | West Delaware County Community School District / 9,509 |
| 105. | 2.96 | Highland Community School District / 3,719 |
| 105. | 2.96 | Wilton Community School District / 4,528 |
| 105. | 2.96 | Southeast Warren Community School District / 3,051 |
| 105. | 2.96 | Mediapolis Community School District / 4,814 |
| 105. | 2.96 | Missouri Valley Community School District / 5,332 |
| 112. | 2.95 | West Marshall Community School District / 4,766 |
| 112. | 2.95 | Keota Community School District / 2,040 |
| 112. | 2.95 | Delwood Community School District / 1,223 |
| 112. | 2.95 | Kingsley-Pierson Community School District / 2,482 |
| 112. | 2.95 | Guthrie Center Community School District / 2,648 |
| 112. | 2.95 | Carroll Community School District / 14,441 |
| 112. | 2.95 | Schleswig Community School District / 1,670 |
| 112. | 2.95 | Sibley-Ocheyedan Community School District / 4,733 |
| 112. | 2.95 | Durant Community School District / 3,069 |
| 112. | 2.95 | Washington Community School District / 10,116 |
| 112. | 2.95 | North Winneshiek Community School District / 1,829 |
| 112. | 2.95 | Bettendorf Community School District / 21,800 |
| 112. | 2.95 | Baxter Community School District / 1,899 |
| 125. | 2.94 | Ottumwa Community School District / 29,183 |
| 125. | 2.94 | Hudson Community School District / 3,709 |
| 125. | 2.94 | Hampton-Dumont Community School District / 6,933 |
| 125. | 2.94 | Fremont-Mills Community School District / 2,432 |
| 125. | 2.94 | Alta Community School District / 2,888 |
| 125. | 2.94 | Preston Community School District / 1,842 |
| 125. | 2.94 | Albia Community School District / 7,304 |
| 125. | 2.94 | Pekin Community School District / 3,728 |
| 125. | 2.94 | Fremont Community School District / 1,135 |
| 125. | 2.94 | Springville Community School District / 2,459 |
| 125. | 2.94 | South Hamilton Community School District / 3,802 |
| 125. | 2.94 | Chariton Community School District / 7,354 |
| 125. | 2.94 | Waco Community School District / 3,049 |
| 125. | 2.94 | Waterloo Community School District / 78,321 |
| 125. | 2.94 | Colfax-Mingo Community School District / 4,409 |
| 125. | 2.94 | West Branch Community School District / 4,574 |
| 125. | 2.94 | Nevada Community School District / 8,476 |
| 125. | 2.94 | Iowa City Community School District / 105,355 |
| 143. | 2.93 | Clear Creek-Amana Community School District / 11,999 |
| 143. | 2.93 | Cedar Rapids Community School District / 119,310 |
| 143. | 2.93 | Roland-Story Community School District / 5,761 |
| 143. | 2.93 | Calamus-Wheatland Community School District / 2,502 |
| 143. | 2.93 | Cal Community School District / 1,606 |
| 143. | 2.93 | Alden Community School District / 1,572 |
| 143. | 2.93 | George-Little Rock Community School District / 2,664 |
| 143. | 2.93 | Akron-Westfield Community School District / 3,150 |
| 143. | 2.93 | Russell Community School District / 1,065 |
| 143. | 2.93 | Alburnett Community School District / 3,267 |
| 143. | 2.93 | West Hancock Community School District / 3,893 |
| 143. | 2.93 | Woodbine Community School District / 2,467 |
| 143. | 2.93 | Howard-Winneshiek Community School District / 9,186 |
| 156. | 2.92 | East Buchanan Community School District / 2,961 |
| 156. | 2.92 | Schaller-Crestland Community School District / 2,268 |
| 156. | 2.92 | Denver Community School District / 3,847 |
| 156. | 2.92 | Bennett Community School District / 1,279 |
| 156. | 2.92 | Anthon-Oto Community School District / 1,381 |
| 156. | 2.92 | Keokuk Community School District / 12,959 |
| 156. | 2.92 | Charles City Community School District / 11,362 |
| 156. | 2.92 | Newell-Fonda Community School District / 2,463 |
| 156. | 2.92 | H-L-V Community School District / 2,172 |
| 156. | 2.92 | West Central Community School District / 1,877 |
| 156. | 2.92 | PCM Community School District / 5,681 |
| 156. | 2.92 | St. Ansgar Community School District / 3,987 |
| 168. | 2.91 | Colo-Nesco Community School District / 2,961 |
| 168. | 2.91 | Eddyville-Blakesburg Community School District / 4,054 |
| 168. | 2.91 | Lynnville-Sully Community School District / 2,846 |
| 168. | 2.91 | Starmont Community School District / 3,896 |
| 168. | 2.91 | Northeast Hamilton Community School District / 1,441 |
| 168. | 2.91 | New Hampton Community School District / 6,942 |
| 168. | 2.91 | Mount Pleasant Community School District / 13,009 |
| 168. | 2.91 | Estherville Lincoln Central Community School District / 8,215 |
| 168. | 2.91 | Garner-Hayfield Community School District / 4,033 |
| 168. | 2.91 | New London Community School District / 3,092 |
| 168. | 2.91 | Harlan Community School District / 8,688 |
| 168. | 2.91 | English Valleys Community School District / 3,028 |
| 168. | 2.91 | Independence Community School District / 9,100 |
| 168. | 2.91 | Oskaloosa Community School District / 16,046 |
| 168. | 2.91 | Galva-Holstein Community School District / 2,673 |
| 183. | 2.90 | Clinton Community School District / 26,478 |
| 183. | 2.90 | North Tama County Community School District / 3,111 |
| 183. | 2.90 | Twin Cedars Community School District / 2,402 |
| 183. | 2.90 | North Central Community School District / 3,018 |
| 183. | 2.90 | West Bend-Mallard Community School District / 2,020 |
| 183. | 2.90 | Madrid Community School District / 3,536 |
| 183. | 2.90 | Vinton-Shellsburg Community School District / 10,406 |
| 183. | 2.90 | Belle Plaine Community School District / 3,528 |
| 183. | 2.90 | Saydel Community School District / 8,830 |
| 183. | 2.90 | Osage Community School District / 6,096 |
| 183. | 2.90 | Rockwell-Swaledale Community School District / 1,970 |
| 183. | 2.90 | Boone Community School District / 14,454 |
| 183. | 2.90 | North Cedar Community School District / 5,263 |
| 196. | 2.89 | Allamakee Community School District / 8,992 |
| 196. | 2.89 | Westwood Community School District / 3,288 |
| 196. | 2.89 | BCLUW Community School District / 3,416 |
| 196. | 2.89 | Bellevue Community School District / 4,425 |
| 196. | 2.89 | Valley Community School District / 2,820 |
| 196. | 2.89 | Corwith-Wesley Community School District / 1,057 |
| 196. | 2.89 | Danville Community School District / 2,680 |
| 196. | 2.89 | Adair-Casey Community School District / 2,014 |
| 196. | 2.89 | Riverside Community School District / 3,951 |
| 196. | 2.89 | Paton-Churdan Community School District / 1,147 |
| 196. | 2.89 | Maquoketa Valley Community School District / 4,585 |
| 196. | 2.89 | Boyer Valley Community School District / 2,699 |
| 196. | 2.89 | Monticello Community School District / 6,519 |
| 196. | 2.89 | Grundy Center Community School District / 3,788 |
| 196. | 2.89 | Mormon Trail Community School District / 1,636 |
| 196. | 2.89 | Griswold Community School District / 3,434 |
| 196. | 2.89 | Clay Central-Everly Community School District / 2,301 |
| 213. | 2.88 | Eagle Grove Community School District / 4,929 |
| 213. | 2.88 | Ogden Community School District / 3,641 |
| 213. | 2.88 | West Central Valley Community School District / 5,805 |
| 213. | 2.88 | C and M Community School District / 1,251 |
| 213. | 2.88 | Odebolt-Arthur Community School District / 2,006 |
| 213. | 2.88 | Whiting Community School District / 1,170 |
| 213. | 2.88 | Sumner Community School District / 3,274 |
| 213. | 2.88 | Tipton Community School District / 5,073 |
| 213. | 2.88 | Graettinger Community School District / 1,367 |
| 213. | 2.88 | Wayne Community School District / 3,522 |
| 213. | 2.88 | Coon Rapids-Bayard Community School District / 2,632 |
| 213. | 2.88 | Glidden-Ralston Community School District / 1,883 |
| 213. | 2.88 | Moulton-Udell Community School District / 1,466 |
| 213. | 2.88 | West Harrison Community School District / 2,700 |
| 213. | 2.88 | Webster City Community School District / 9,820 |
| 213. | 2.88 | Marion Independent School District / 11,990 |
| 213. | 2.88 | Creston Community School District / 9,722 |
| 213. | 2.88 | Cedar Falls Community School District / 40,251 |
| 213. | 2.88 | Aplington-Parkersburg Community School District / 4,547 |
| 213. | 2.88 | Tripoli Community School District / 2,524 |
| 233. | 2.87 | Rudd-Rockford-Marble Rock Community School District / 2,930 |
| 233. | 2.87 | Hartley-Melvin-Sanborn Community School District / 4,601 |
| 233. | 2.87 | Fort Dodge Community School District / 29,627 |
| 233. | 2.87 | Ruthven-Ayrshire Community School District / 1,548 |
| 233. | 2.87 | Stratford Community School District / 1,307 |
| 233. | 2.87 | Orient-Macksburg Community School District / 1,378 |
| 233. | 2.87 | Brooklyn-Guernsey-Malcom Community School District / 3,347 |
| 233. | 2.87 | Central City Community School District / 2,813 |
| 233. | 2.87 | Hamburg Community School District / 1,671 |
| 233. | 2.87 | Burlington Community School District / 29,942 |
| 233. | 2.87 | Camanche Community School District / 5,293 |
| 244. | 2.86 | West Monona Community School District / 4,180 |
| 244. | 2.86 | Nora Springs-Rock Falls Community School District / 2,466 |
| 244. | 2.86 | Sheffield Chapin Meservey Thornton Community School District / 2,982 |
| 244. | 2.86 | Central Lee Community School District / 5,363 |
| 244. | 2.86 | Nashua-Plainfield Community School District / 4,147 |
| 244. | 2.86 | Clarion-Goldfield Community School District / 4,752 |
| 244. | 2.86 | Red Oak Community School District / 7,118 |
| 244. | 2.86 | River Valley Community School District / 2,753 |
| 244. | 2.86 | East Union Community School District / 3,035 |
| 244. | 2.86 | Iowa Valley Community School District / 3,679 |
| 244. | 2.86 | Essex Community School District / 1,340 |
| 244. | 2.86 | Manning Community School District / 2,240 |
| 244. | 2.86 | Forest City Community School District / 6,814 |
| 244. | 2.86 | Sioux Central Community School District / 2,478 |
| 244. | 2.86 | Waverly-Shell Rock Community School District / 13,798 |
| 244. | 2.86 | Maple Valley Community School District / 2,951 |
| 260. | 2.85 | United Community School District / 2,243 |
| 260. | 2.85 | North Fayette Community School District / 6,282 |
| 260. | 2.85 | East Central Community School District / 2,263 |
| 260. | 2.85 | Newton Community School District / 21,271 |
| 260. | 2.85 | Eldora-New Providence Community School District / 3,990 |
| 260. | 2.85 | Maquoketa Community School District / 9,080 |
| 260. | 2.85 | Hubbard-Radcliffe Community School District / 2,654 |
| 260. | 2.85 | Centerville Community School District / 9,212 |
| 260. | 2.85 | Nishna Valley Community School District / 1,334 |
| 269. | 2.84 | Southeast Webster-Grand Community School District / 3,439 |
| 269. | 2.84 | Decorah Community School District / 11,998 |
| 269. | 2.84 | Tri-County Community School District / 1,813 |
| 269. | 2.84 | Manson Northwest Webster Community School District / 4,144 |
| 269. | 2.84 | Grinnell-Newburg Community School District / 12,151 |
| 269. | 2.84 | Jefferson-Scranton Community School District / 6,127 |
| 269. | 2.84 | Humboldt Community School District / 7,582 |
| 269. | 2.84 | Turkey Valley Community School District / 3,057 |
| 269. | 2.84 | Prairie Valley Community School District / 3,851 |
| 269. | 2.84 | East Marshall Community School District / 3,886 |
| 269. | 2.84 | Fredericksburg Community School District / 1,700 |
| 280. | 2.83 | Sigourney Community School District / 3,596 |
| 280. | 2.83 | Sentral Community School District / 1,110 |
| 280. | 2.83 | Mason City Community School District / 29,170 |
| 280. | 2.83 | Bedford Community School District / 2,894 |
| 280. | 2.83 | Walnut Community School District / 1,193 |
| 280. | 2.83 | Janesville Consolidated School District / 2,375 |
| 280. | 2.83 | North Kossuth Community School District / 2,239 |
| 280. | 2.83 | Olin Consolidated School District / 1,516 |
| 280. | 2.83 | GMG Community School District / 1,888 |
| 280. | 2.83 | Sidney Community School District / 2,072 |
| 280. | 2.83 | Algona Community School District / 9,173 |
| 280. | 2.83 | Belmond-Klemme Community School District / 4,412 |
| 280. | 2.83 | South Clay Community School District / 910 |
| 280. | 2.83 | Pomeroy-Palmer Community School District / 1,528 |
| 294. | 2.82 | Iowa Falls Community School District / 6,941 |
| 294. | 2.82 | Titonka Consolidated School District / 1,017 |
| 294. | 2.82 | Nodaway Valley Community School District / 4,351 |
| 294. | 2.82 | Twin Rivers Community School District / 1,155 |
| 294. | 2.82 | Allison-Bristow Community School District / 1,877 |
| 294. | 2.82 | Fort Madison Community School District / 17,311 |
| 294. | 2.82 | Central Community School District / 3,402 |
| 294. | 2.82 | Farragut Community School District / 1,445 |
| 294. | 2.82 | Villisca Community School District / 2,173 |
| 294. | 2.82 | Audubon Community School District / 3,598 |
| 294. | 2.82 | Clarksville Community School District / 2,161 |
| 294. | 2.82 | Aurelia Community School District / 1,658 |
| 294. | 2.82 | Panorama Community School District / 4,664 |
| 294. | 2.82 | Marcus-Meriden-Cleghorn Community School District / 2,860 |
| 294. | 2.82 | Southern Cal Community School District / 3,192 |
| 294. | 2.82 | Anamosa Community School District / 9,447 |
| 294. | 2.82 | Cardinal Community School District / 3,896 |
| 311. | 2.81 | A-H-S-T Community School District / 3,601 |
| 311. | 2.81 | Spencer Community School District / 12,176 |
| 311. | 2.81 | Midland Community School District / 3,642 |
| 311. | 2.81 | MFL MarMac Community School District / 5,385 |
| 311. | 2.81 | Emmetsburg Community School District / 4,991 |
| 311. | 2.81 | Shenandoah Community School District / 6,281 |
| 311. | 2.81 | Charter Oak-Ute Community School District / 1,933 |
| 311. | 2.81 | Clarinda Community School District / 6,873 |
| 311. | 2.81 | Battle Creek-Ida Grove Community School District / 3,905 |
| 311. | 2.81 | Atlantic Community School District / 8,807 |
| 311. | 2.81 | Elk Horn-Kimballton Community School District / 1,557 |
| 311. | 2.81 | Clearfield Community School District / 627 |
| 323. | 2.80 | Wall Lake View Auburn Community School District / 3,363 |
| 323. | 2.80 | South Page Community School District / 1,448 |
| 323. | 2.80 | Albert City-Truesdale Community School District / 1,472 |
| 323. | 2.80 | Ames Community School District / 56,434 |
| 323. | 2.80 | Northwood-Kensett Community School District / 3,375 |
| 323. | 2.80 | Gilmore City-Bradgate Community School District / 928 |
| 329. | 2.79 | Clear Lake Community School District / 8,522 |
| 329. | 2.79 | Prescott Community School District / 601 |
| 329. | 2.79 | IKM Community School District / 2,282 |
| 329. | 2.79 | Corning Community School District / 2,914 |
| 329. | 2.79 | Woden-Crystal Lake Community School District / 912 |
| 329. | 2.79 | Lake Mills Community School District / 3,888 |
| 329. | 2.79 | Stanton Community School District / 1,143 |
| 329. | 2.79 | Eastern Allamakee Community School District / 2,730 |
| 329. | 2.79 | Fairfield Community School District / 15,529 |
| 338. | 2.78 | Gladbrook-Reinbeck Community School District / 4,260 |
| 338. | 2.78 | South O'Brien Community School District / 4,478 |
| 338. | 2.78 | AGWSR Community School District / 4,513 |
| 338. | 2.78 | Exira Community School District / 1,796 |
| 342. | 2.77 | Moravia Community School District / 2,089 |
| 342. | 2.77 | Montezuma Community School District / 3,499 |
| 342. | 2.77 | North Iowa Community School District / 3,210 |
| 342. | 2.77 | Harris-Lake Park Community School District / 1,813 |
| 342. | 2.77 | Terril Community School District / 993 |
| 342. | 2.77 | Greene Community School District / 2,045 |
| 342. | 2.77 | West Burlington Independent School District / 2,806 |
| 349. | 2.76 | Lineville-Clio Community School District / 533 |
| 349. | 2.76 | Clayton Ridge Community School District / 5,057 |
| 349. | 2.76 | Anita Community School District / 1,759 |
| 349. | 2.76 | Cherokee Community School District / 6,578 |
| 349. | 2.76 | New Market Community School District / 957 |
| 354. | 2.75 | Sac Community School District / 2,765 |
| 354. | 2.75 | Armstrong-Ringsted Community School District / 2,091 |
| 356. | 2.74 | Rockwell City-Lytton Community School District / 3,084 |
| 356. | 2.74 | Laurens-Marathon Community School District / 2,114 |
| 356. | 2.74 | Pocahontas Area Community School District / 3,593 |
| 359. | 2.73 | Spirit Lake Community School District / 7,836 |
| 360. | 2.72 | Dows Community School District / 972 |
| 361. | 2.68 | Lu Verne Community School District / 534 |
| 362. | 2.65 | Ventura Community School District / 1,834 |
| 363. | 2.63 | Okoboji Community School District / 6,831 |
Please note that we only rank locations with 'Average Family Size' data. The rank above might not be a complete list. Locations without 'Average Family Size' data are not listed.
