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Decatur, IL Historical First Ancestry Data
ACS 2010-2014 data
62,840 (83.69%) out of the total population of 75,088 reported first ancestry.
| Decatur, IL | % of the Total Population | Illinois | U.S. | |
| Arab | 190 | 0.25%, see rank | 0.71% | 0.56% |
| Czech | 192 | 0.26%, see rank | 0.92% | 0.47% |
| Danish | 173 | 0.23%, see rank | 0.38% | 0.42% |
| Dutch | 1,732 | 2.31%, see rank | 1.37% | 1.40% |
| English | 6,277 | 8.36%, see rank | 5.90% | 8.02% |
| French | 1,579 | 2.10%, see rank | 2.13% | 3.34% |
| German | 15,682 | 20.88%, see rank | 19.07% | 15.03% |
| Greek | 328 | 0.44%, see rank | 0.76% | 0.41% |
| Hungarian | 229 | 0.30%, see rank | 0.40% | 0.46% |
| Irish | 9,881 | 13.16%, see rank | 12.00% | 10.80% |
| Italian | 1,761 | 2.35%, see rank | 6.14% | 5.52% |
| Norwegian | 618 | 0.82%, see rank | 1.25% | 1.42% |
| Polish | 1,680 | 2.24%, see rank | 7.22% | 3.01% |
| Portuguese | 40 | 0.05%, see rank | 0.08% | 0.44% |
| Russian | 169 | 0.23%, see rank | 0.97% | 0.92% |
| Scotch-Irish | 847 | 1.13%, see rank | 0.59% | 0.99% |
| Scottish | 1,256 | 1.67%, see rank | 1.16% | 1.72% |
| Subsaharan African | 568 | 0.76%, see rank | 0.64% | 0.95% |
| Swedish | 492 | 0.66%, see rank | 2.13% | 1.27% |
| Swiss | 139 | 0.19%, see rank | 0.27% | 0.30% |
| Ukrainian | 91 | 0.12%, see rank | 0.40% | 0.31% |
| American | 9,712 | 12.93%, see rank | 5.00% | 7.12% |
| Welsh | 383 | 0.51%, see rank | 0.37% | 0.57% |
ACS 2008-2012 data
63,934 (84.02%) out of the total population of 76,091 reported first ancestry.
| Decatur, IL | % of the Total Population | Illinois | U.S. | |
| Arab | 280 | 0.37%, see rank | 0.64% | 0.53% |
| Czech | 204 | 0.27%, see rank | 0.96% | 0.50% |
| Danish | 180 | 0.24%, see rank | 0.40% | 0.45% |
| Dutch | 1,279 | 1.68%, see rank | 1.46% | 1.51% |
| English | 7,112 | 9.35%, see rank | 6.23% | 8.53% |
| French | 1,666 | 2.19%, see rank | 2.26% | 3.54% |
| German | 14,589 | 19.17%, see rank | 19.89% | 15.79% |
| Greek | 290 | 0.38%, see rank | 0.78% | 0.42% |
| Hungarian | 254 | 0.33%, see rank | 0.41% | 0.48% |
| Irish | 9,089 | 11.94%, see rank | 12.52% | 11.36% |
| Italian | 1,532 | 2.01%, see rank | 6.29% | 5.66% |
| Norwegian | 597 | 0.78%, see rank | 1.30% | 1.46% |
| Polish | 1,566 | 2.06%, see rank | 7.47% | 3.13% |
| Portuguese | 41 | 0.05%, see rank | 0.08% | 0.46% |
| Russian | 87 | 0.11%, see rank | 1.03% | 0.97% |
| Scotch-Irish | 1,010 | 1.33%, see rank | 0.65% | 1.07% |
| Scottish | 1,239 | 1.63%, see rank | 1.20% | 1.81% |
| Subsaharan African | 381 | 0.50%, see rank | 0.62% | 0.93% |
| Swedish | 622 | 0.82%, see rank | 2.24% | 1.34% |
| Swiss | 133 | 0.17%, see rank | 0.29% | 0.31% |
| Ukrainian | 127 | 0.17%, see rank | 0.40% | 0.31% |
| American | 12,369 | 16.26%, see rank | 4.85% | 6.72% |
| Welsh | 396 | 0.52%, see rank | 0.40% | 0.60% |
ACS 2006-2010 data
64,559 (84.47%) out of the total population of 76,429 reported first ancestry.
| Decatur, IL | % of the Total Population | Illinois | U.S. | |
| Arab | 172 | 0.23%, see rank | 0.55% | 0.50% |
| Czech | 194 | 0.25%, see rank | 1.01% | 0.53% |
| Danish | 118 | 0.15%, see rank | 0.42% | 0.48% |
| Dutch | 1,233 | 1.61%, see rank | 1.58% | 1.63% |
| English | 7,427 | 9.72%, see rank | 6.56% | 9.02% |
| French | 1,686 | 2.21%, see rank | 2.43% | 3.77% |
| German | 15,416 | 20.17%, see rank | 20.72% | 16.51% |
| Greek | 341 | 0.45%, see rank | 0.83% | 0.44% |
| Hungarian | 231 | 0.30%, see rank | 0.43% | 0.51% |
| Irish | 9,737 | 12.74%, see rank | 12.94% | 11.76% |
| Italian | 1,740 | 2.28%, see rank | 6.35% | 5.78% |
| Norwegian | 555 | 0.73%, see rank | 1.36% | 1.51% |
| Polish | 1,558 | 2.04%, see rank | 7.69% | 3.24% |
| Portuguese | 90 | 0.12%, see rank | 0.08% | 0.47% |
| Russian | 60 | 0.08%, see rank | 1.07% | 1.01% |
| Scotch-Irish | 1,194 | 1.56%, see rank | 1.12% | 1.72% |
| Scottish | 1,176 | 1.54%, see rank | 1.26% | 1.92% |
| Subsaharan African | 169 | 0.22%, see rank | 0.63% | 0.91% |
| Swedish | 706 | 0.92%, see rank | 2.37% | 1.41% |
| Swiss | 176 | 0.23%, see rank | 0.33% | 0.33% |
| Ukrainian | 83 | 0.11%, see rank | 0.40% | 0.31% |
| American | 11,484 | 15.03%, see rank | 4.61% | 6.28% |
| Welsh | 368 | 0.48%, see rank | 0.41% | 0.63% |
ACS 2005-2009 data
63,371 (83.53%) out of the total population of 75,867 reported first ancestry.
| Decatur, IL | % of the Total Population | Illinois | U.S. | |
| Arab | 195 | 0.26%, see rank | 0.52% | 0.50% |
| Czech | 198 | 0.26%, see rank | 1.02% | 0.54% |
| Danish | 139 | 0.18%, see rank | 0.44% | 0.49% |
| Dutch | 1,317 | 1.74%, see rank | 1.61% | 1.68% |
| English | 8,037 | 10.59%, see rank | 6.71% | 9.29% |
| French | 1,878 | 2.48%, see rank | 2.51% | 3.90% |
| German | 16,296 | 21.48%, see rank | 21.16% | 16.89% |
| Greek | 406 | 0.54%, see rank | 0.85% | 0.45% |
| Hungarian | 272 | 0.36%, see rank | 0.45% | 0.52% |
| Irish | 10,219 | 13.47%, see rank | 13.14% | 12.01% |
| Italian | 2,080 | 2.74%, see rank | 6.45% | 5.91% |
| Norwegian | 473 | 0.62%, see rank | 1.38% | 1.55% |
| Polish | 1,334 | 1.76%, see rank | 7.85% | 3.32% |
| Portuguese | 120 | 0.16%, see rank | 0.07% | 0.48% |
| Russian | 64 | 0.08%, see rank | 1.11% | 1.04% |
| Scotch-Irish | 1,225 | 1.61%, see rank | 1.15% | 1.77% |
| Scottish | 1,109 | 1.46%, see rank | 1.31% | 1.97% |
| Subsaharan African | 184 | 0.24%, see rank | 0.62% | 0.88% |
| Swedish | 731 | 0.96%, see rank | 2.46% | 1.45% |
| Swiss | 158 | 0.21%, see rank | 0.33% | 0.34% |
| Ukrainian | 80 | 0.11%, see rank | 0.40% | 0.32% |
| American | 9,386 | 12.37%, see rank | 4.55% | 6.43% |
| Welsh | 422 | 0.56%, see rank | 0.42% | 0.65% |
US Census 2000 data
57,939 (70.78%) out of the total population of 81,860 reported first ancestry.
| Decatur, IL | % of the Total Population | Illinois | U.S. | |
| Arab | 63 | 0.08%, see rank | 0.38% | 0.36% |
| Czech | 73 | 0.09%, see rank | 0.57% | 0.27% |
| Danish | 66 | 0.08%, see rank | 0.26% | 0.30% |
| Dutch | 614 | 0.75%, see rank | 0.90% | 0.91% |
| English | 5,324 | 6.50%, see rank | 4.12% | 5.91% |
| French | 1,257 | 1.54%, see rank | 1.34% | 2.39% |
| German | 12,477 | 15.24%, see rank | 13.82% | 10.81% |
| Greek | 135 | 0.16%, see rank | 0.65% | 0.34% |
| Hungarian | 88 | 0.11%, see rank | 0.27% | 0.32% |
| Irish | 5,587 | 6.83%, see rank | 7.62% | 6.85% |
| Italian | 1,019 | 1.24%, see rank | 4.81% | 4.59% |
| Norwegian | 399 | 0.49%, see rank | 0.96% | 1.15% |
| Polish | 921 | 1.13%, see rank | 5.68% | 2.24% |
| Portuguese | 14 | 0.02%, see rank | 0.04% | 0.33% |
| Russian | 106 | 0.13%, see rank | 0.72% | 0.68% |
| Scotch-Irish | 994 | 1.21%, see rank | 0.73% | 1.17% |
| Scottish | 647 | 0.79%, see rank | 0.73% | 1.12% |
| Subsaharan African | 626 | 0.76%, see rank | 0.57% | 0.61% |
| Swedish | 468 | 0.57%, see rank | 1.52% | 0.87% |
| Swiss | 131 | 0.16%, see rank | 0.17% | 0.19% |
| Ukrainian | 24 | 0.03%, see rank | 0.30% | 0.24% |
| American | 8,418 | 10.28%, see rank | 4.58% | 7.33% |
| Welsh | 253 | 0.31%, see rank | 0.20% | 0.31% |
* 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.