Decatur County Historical Age Data
ACS 2010-2014 data
Total population: 8,286
Median Age (
see rank)
| Decatur County | 37.60 years old |
| Iowa | 38.00 years old |
| U.S. | 37.40 years old |
Median Age, Male (
see rank)
| Decatur County | 35.30 years old |
| Iowa | 36.70 years old |
| U.S. | 36.10 years old |
Median Age, Female (
see rank)
| Decatur County | 39.80 years old |
| Iowa | 39.40 years old |
| U.S. | 38.80 years old |
| | Decatur County | % of the Total Population | Iowa | U.S. |
| Under 5 years | 471 | 5.68%, see rank | 6.39% | 6.36% |
| 5 to 9 years | 556 | 6.71%, see rank | 6.62% | 6.51% |
| 10 to 14 years | 452 | 5.45%, see rank | 6.58% | 6.59% |
| 15 to 19 years | 808 | 9.75%, see rank | 6.96% | 6.85% |
| 20 to 24 years | 891 | 10.75%, see rank | 7.21% | 7.13% |
| 25 to 34 years | 743 | 8.97%, see rank | 12.65% | 13.47% |
| 35 to 44 years | 807 | 9.74%, see rank | 11.80% | 12.96% |
| 45 to 54 years | 992 | 11.97%, see rank | 13.73% | 14.09% |
| 55 to 64 years | 1,064 | 12.84%, see rank | 12.80% | 12.29% |
| 65 to 74 years | 742 | 8.95%, see rank | 7.81% | 7.64% |
| 75 to 84 | 482 | 5.82%, see rank | 4.98% | 4.25% |
| 85 years and over | 278 | 3.36%, see rank | 2.48% | 1.85% |
US Census 2010 data
Total population: 8,457
Median Age (
see rank)
| Decatur County | 38.20 years old |
| Iowa | 38.10 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Decatur County | 35.70 years old |
| Iowa | 36.60 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Decatur County | 40.50 years old |
| Iowa | 39.50 years old |
| U.S. | 38.50 years old |
| | Decatur County | % of the Total Population | Iowa | U.S. |
| Under 5 years | 532 | 6.29%, see rank | 6.63% | 6.54% |
| 5 to 9 years | 510 | 6.03%, see rank | 6.59% | 6.59% |
| 10 to 14 years | 522 | 6.17%, see rank | 6.59% | 6.70% |
| 15 to 19 years | 764 | 9.03%, see rank | 7.12% | 7.14% |
| 20 to 24 years | 859 | 10.16%, see rank | 7.00% | 6.99% |
| 25 to 34 years | 786 | 9.29%, see rank | 12.56% | 13.30% |
| 35 to 44 years | 831 | 9.83%, see rank | 11.97% | 13.30% |
| 45 to 54 years | 1,094 | 12.94%, see rank | 14.43% | 14.58% |
| 55 to 64 years | 1,026 | 12.13%, see rank | 12.24% | 11.82% |
| 65 to 74 years | 746 | 8.82%, see rank | 7.37% | 7.03% |
| 75 to 84 | 558 | 6.60%, see rank | 5.04% | 4.23% |
| 85 years and over | 229 | 2.71%, see rank | 2.45% | 1.78% |
ACS 2008-2012 data
Total population: 8,382
Median Age (
see rank)
| Decatur County | 38.40 years old |
| Iowa | 38.00 years old |
| U.S. | 37.20 years old |
Median Age, Male (
see rank)
| Decatur County | 35.80 years old |
| Iowa | 36.60 years old |
| U.S. | 35.80 years old |
Median Age, Female (
see rank)
| Decatur County | 41.10 years old |
| Iowa | 39.40 years old |
| U.S. | 38.50 years old |
| | Decatur County | % of the Total Population | Iowa | U.S. |
| Under 5 years | 496 | 5.92%, see rank | 6.53% | 6.51% |
| 5 to 9 years | 484 | 5.77%, see rank | 6.58% | 6.57% |
| 10 to 14 years | 532 | 6.35%, see rank | 6.60% | 6.68% |
| 15 to 19 years | 911 | 10.87%, see rank | 7.14% | 7.09% |
| 20 to 24 years | 712 | 8.49%, see rank | 7.08% | 7.04% |
| 25 to 34 years | 764 | 9.11%, see rank | 12.55% | 13.32% |
| 35 to 44 years | 858 | 10.24%, see rank | 12.02% | 13.34% |
| 45 to 54 years | 1,057 | 12.61%, see rank | 14.28% | 14.44% |
| 55 to 64 years | 1,057 | 12.61%, see rank | 12.27% | 11.84% |
| 65 to 74 years | 733 | 8.74%, see rank | 7.45% | 7.12% |
| 75 to 84 | 634 | 7.56%, see rank | 5.08% | 4.25% |
| 85 years and over | 144 | 1.72%, see rank | 2.42% | 1.78% |
ACS 2006-2010 data
Total population: 8,508
Median Age (
see rank)
| Decatur County | 38.70 years old |
| Iowa | 38.00 years old |
| U.S. | 36.90 years old |
Median Age, Male (
see rank)
| Decatur County | 36.40 years old |
| Iowa | 36.60 years old |
| U.S. | 35.60 years old |
Median Age, Female (
see rank)
| Decatur County | 41.40 years old |
| Iowa | 39.30 years old |
| U.S. | 38.10 years old |
| | Decatur County | % of the Total Population | Iowa | U.S. |
| Under 5 years | 509 | 5.98%, see rank | 6.56% | 6.62% |
| 5 to 9 years | 419 | 4.92%, see rank | 6.57% | 6.62% |
| 10 to 14 years | 614 | 7.22%, see rank | 6.64% | 6.79% |
| 15 to 19 years | 848 | 9.97%, see rank | 7.28% | 7.28% |
| 20 to 24 years | 787 | 9.25%, see rank | 7.14% | 6.98% |
| 25 to 34 years | 767 | 9.02%, see rank | 12.25% | 13.22% |
| 35 to 44 years | 915 | 10.75%, see rank | 12.56% | 13.89% |
| 45 to 54 years | 1,120 | 13.16%, see rank | 14.61% | 14.57% |
| 55 to 64 years | 975 | 11.46%, see rank | 11.58% | 11.28% |
| 65 to 74 years | 727 | 8.54%, see rank | 7.21% | 6.74% |
| 75 to 84 | 558 | 6.56%, see rank | 5.24% | 4.30% |
| 85 years and over | 269 | 3.16%, see rank | 2.36% | 1.70% |
ACS 2005-2009 data
Total population: 8,321
Median Age (
see rank)
| Decatur County | 37.50 years old |
| Iowa | 37.90 years old |
| U.S. | 36.50 years old |
Median Age, Male (
see rank)
| Decatur County | 34.20 years old |
| Iowa | 36.50 years old |
| U.S. | 35.20 years old |
Median Age, Female (
see rank)
| Decatur County | 40.90 years old |
| Iowa | 39.30 years old |
| U.S. | 37.90 years old |
| | Decatur County | % of the Total Population | Iowa | U.S. |
| Under 5 years | 475 | 5.71%, see rank | 6.61% | 6.92% |
| 5 to 9 years | 462 | 5.55%, see rank | 6.38% | 6.59% |
| 10 to 14 years | 507 | 6.09%, see rank | 6.59% | 6.83% |
| 15 to 19 years | 890 | 10.70%, see rank | 7.37% | 7.15% |
| 20 to 24 years | 740 | 8.89%, see rank | 7.65% | 7.02% |
| 25 to 34 years | 909 | 10.92%, see rank | 11.90% | 13.42% |
| 35 to 44 years | 890 | 10.70%, see rank | 12.95% | 14.18% |
| 45 to 54 years | 1,086 | 13.05%, see rank | 14.71% | 14.48% |
| 55 to 64 years | 873 | 10.49%, see rank | 11.11% | 10.81% |
| 65 to 74 years | 681 | 8.18%, see rank | 7.05% | 6.50% |
| 75 to 84 | 547 | 6.57%, see rank | 5.30% | 4.40% |
| 85 years and over | 261 | 3.14%, see rank | 2.38% | 1.71% |
US Census 2000 data
Total population: 8,689
Median Age (
see rank)
| Decatur County | 36.40 years old |
| Iowa | 36.60 years old |
| U.S. | 35.30 years old |
Median Age, Male (
see rank)
| Decatur County | 34.10 years old |
| Iowa | 35.20 years old |
| U.S. | 34.00 years old |
Median Age, Female (
see rank)
| Decatur County | 38.30 years old |
| Iowa | 38.00 years old |
| U.S. | 36.50 years old |
| | Decatur County | % of the Total Population | Iowa | U.S. |
| Under 5 years | 481 | 5.54%, see rank | 6.44% | 6.81% |
| 5 to 9 years | 545 | 6.27%, see rank | 6.92% | 7.30% |
| 10 to 14 years | 589 | 6.78%, see rank | 7.19% | 7.29% |
| 15 to 19 years | 886 | 10.20%, see rank | 7.74% | 7.18% |
| 20 to 24 years | 914 | 10.52%, see rank | 6.96% | 6.74% |
| 25 to 34 years | 797 | 9.17%, see rank | 12.41% | 14.18% |
| 35 to 44 years | 1,078 | 12.41%, see rank | 15.21% | 16.04% |
| 45 to 54 years | 1,040 | 11.97%, see rank | 13.42% | 13.39% |
| 55 to 64 years | 824 | 9.48%, see rank | 8.80% | 8.63% |
| 65 to 74 years | 749 | 8.62%, see rank | 7.24% | 6.54% |
| 75 to 84 | 542 | 6.24%, see rank | 5.44% | 4.39% |
| 85 years and over | 244 | 2.81%, see rank | 2.23% | 1.51% |
* ACS stands for U.S. Census American Community Survey. According to the U.S. Census, if the date is a range, you can interpret the data as an average of the period of time.
