Arapahoe County Historical First Ancestry Data
ACS 2010-2014 data
531,587 (89.09%) out of the total population of 596,684 reported first ancestry.
| Arapahoe County | % of the Total Population | Colorado | U.S. | |
| Arab | 3,988 | 0.67%, see rank | 0.39% | 0.56% |
| Czech | 3,370 | 0.56%, see rank | 0.70% | 0.47% |
| Danish | 4,614 | 0.77%, see rank | 0.82% | 0.42% |
| Dutch | 10,126 | 1.70%, see rank | 1.81% | 1.40% |
| English | 57,662 | 9.66%, see rank | 10.49% | 8.02% |
| French | 18,176 | 3.05%, see rank | 3.48% | 3.34% |
| German | 107,339 | 17.99%, see rank | 20.88% | 15.03% |
| Greek | 2,587 | 0.43%, see rank | 0.38% | 0.41% |
| Hungarian | 2,167 | 0.36%, see rank | 0.39% | 0.46% |
| Irish | 65,438 | 10.97%, see rank | 12.04% | 10.80% |
| Italian | 26,078 | 4.37%, see rank | 5.10% | 5.52% |
| Norwegian | 12,654 | 2.12%, see rank | 2.18% | 1.42% |
| Polish | 14,781 | 2.48%, see rank | 2.51% | 3.01% |
| Portuguese | 1,004 | 0.17%, see rank | 0.21% | 0.44% |
| Russian | 8,891 | 1.49%, see rank | 1.09% | 0.92% |
| Scotch-Irish | 6,418 | 1.08%, see rank | 1.27% | 0.99% |
| Scottish | 13,897 | 2.33%, see rank | 2.56% | 1.72% |
| Subsaharan African | 12,844 | 2.15%, see rank | 0.73% | 0.95% |
| Swedish | 13,153 | 2.20%, see rank | 2.43% | 1.27% |
| Swiss | 2,367 | 0.40%, see rank | 0.46% | 0.30% |
| Ukrainian | 2,418 | 0.41%, see rank | 0.25% | 0.31% |
| American | 32,135 | 5.39%, see rank | 5.18% | 7.12% |
| Welsh | 4,275 | 0.72%, see rank | 0.92% | 0.57% |
ACS 2008-2012 data
526,700 (91.70%) out of the total population of 574,357 reported first ancestry.
| Arapahoe County | % of the Total Population | Colorado | U.S. | |
| Arab | 3,732 | 0.65%, see rank | 0.36% | 0.53% |
| Czech | 3,439 | 0.60%, see rank | 0.73% | 0.50% |
| Danish | 4,558 | 0.79%, see rank | 0.90% | 0.45% |
| Dutch | 9,279 | 1.62%, see rank | 1.91% | 1.51% |
| English | 58,996 | 10.27%, see rank | 11.19% | 8.53% |
| French | 17,935 | 3.12%, see rank | 3.75% | 3.54% |
| German | 108,195 | 18.84%, see rank | 22.06% | 15.79% |
| Greek | 2,759 | 0.48%, see rank | 0.40% | 0.42% |
| Hungarian | 2,382 | 0.41%, see rank | 0.42% | 0.48% |
| Irish | 64,890 | 11.30%, see rank | 12.52% | 11.36% |
| Italian | 25,355 | 4.41%, see rank | 5.22% | 5.66% |
| Norwegian | 12,286 | 2.14%, see rank | 2.26% | 1.46% |
| Polish | 14,084 | 2.45%, see rank | 2.55% | 3.13% |
| Portuguese | 851 | 0.15%, see rank | 0.20% | 0.46% |
| Russian | 9,075 | 1.58%, see rank | 1.15% | 0.97% |
| Scotch-Irish | 6,068 | 1.06%, see rank | 1.37% | 1.07% |
| Scottish | 13,948 | 2.43%, see rank | 2.69% | 1.81% |
| Subsaharan African | 11,830 | 2.06%, see rank | 0.64% | 0.93% |
| Swedish | 14,507 | 2.53%, see rank | 2.64% | 1.34% |
| Swiss | 2,792 | 0.49%, see rank | 0.48% | 0.31% |
| Ukrainian | 2,209 | 0.38%, see rank | 0.25% | 0.31% |
| American | 31,446 | 5.47%, see rank | 4.88% | 6.72% |
| Welsh | 4,433 | 0.77%, see rank | 0.93% | 0.60% |
ACS 2006-2010 data
515,064 (93.16%) out of the total population of 552,860 reported first ancestry.
| Arapahoe County | % of the Total Population | Colorado | U.S. | |
| Arab | 3,268 | 0.59%, see rank | 0.33% | 0.50% |
| Czech | 4,000 | 0.72%, see rank | 0.78% | 0.53% |
| Danish | 4,913 | 0.89%, see rank | 0.95% | 0.48% |
| Dutch | 9,366 | 1.69%, see rank | 1.98% | 1.63% |
| English | 60,096 | 10.87%, see rank | 11.90% | 9.02% |
| French | 19,369 | 3.50%, see rank | 3.96% | 3.77% |
| German | 106,123 | 19.20%, see rank | 22.99% | 16.51% |
| Greek | 2,739 | 0.50%, see rank | 0.40% | 0.44% |
| Hungarian | 2,648 | 0.48%, see rank | 0.43% | 0.51% |
| Irish | 63,281 | 11.45%, see rank | 12.87% | 11.76% |
| Italian | 24,080 | 4.36%, see rank | 5.18% | 5.78% |
| Norwegian | 11,370 | 2.06%, see rank | 2.34% | 1.51% |
| Polish | 14,264 | 2.58%, see rank | 2.54% | 3.24% |
| Portuguese | 875 | 0.16%, see rank | 0.22% | 0.47% |
| Russian | 8,754 | 1.58%, see rank | 1.23% | 1.01% |
| Scotch-Irish | 10,379 | 1.88%, see rank | 2.21% | 1.72% |
| Scottish | 15,248 | 2.76%, see rank | 2.86% | 1.92% |
| Subsaharan African | 9,649 | 1.75%, see rank | 0.55% | 0.91% |
| Swedish | 14,638 | 2.65%, see rank | 2.81% | 1.41% |
| Swiss | 2,613 | 0.47%, see rank | 0.52% | 0.33% |
| Ukrainian | 2,209 | 0.40%, see rank | 0.27% | 0.31% |
| American | 30,095 | 5.44%, see rank | 4.46% | 6.28% |
| Welsh | 4,626 | 0.84%, see rank | 0.96% | 0.63% |
ACS 2005-2009 data
509,572 (93.64%) out of the total population of 544,157 reported first ancestry.
| Arapahoe County | % of the Total Population | Colorado | U.S. | |
| Arab | 2,915 | 0.54%, see rank | 0.33% | 0.50% |
| Czech | 4,060 | 0.75%, see rank | 0.80% | 0.54% |
| Danish | 5,289 | 0.97%, see rank | 0.99% | 0.49% |
| Dutch | 9,134 | 1.68%, see rank | 2.06% | 1.68% |
| English | 63,091 | 11.59%, see rank | 12.26% | 9.29% |
| French | 19,663 | 3.61%, see rank | 4.07% | 3.90% |
| German | 112,658 | 20.70%, see rank | 23.49% | 16.89% |
| Greek | 3,037 | 0.56%, see rank | 0.42% | 0.45% |
| Hungarian | 2,495 | 0.46%, see rank | 0.45% | 0.52% |
| Irish | 64,567 | 11.87%, see rank | 13.00% | 12.01% |
| Italian | 24,430 | 4.49%, see rank | 5.20% | 5.91% |
| Norwegian | 11,547 | 2.12%, see rank | 2.40% | 1.55% |
| Polish | 14,061 | 2.58%, see rank | 2.56% | 3.32% |
| Portuguese | 924 | 0.17%, see rank | 0.22% | 0.48% |
| Russian | 9,265 | 1.70%, see rank | 1.28% | 1.04% |
| Scotch-Irish | 11,512 | 2.12%, see rank | 2.31% | 1.77% |
| Scottish | 15,421 | 2.83%, see rank | 2.90% | 1.97% |
| Subsaharan African | 8,253 | 1.52%, see rank | 0.55% | 0.88% |
| Swedish | 14,442 | 2.65%, see rank | 2.84% | 1.45% |
| Swiss | 2,689 | 0.49%, see rank | 0.50% | 0.34% |
| Ukrainian | 2,157 | 0.40%, see rank | 0.27% | 0.32% |
| American | 29,755 | 5.47%, see rank | 4.64% | 6.43% |
| Welsh | 5,267 | 0.97%, see rank | 0.99% | 0.65% |
US Census 2000 data
412,469 (84.53%) out of the total population of 487,967 reported first ancestry.
| Arapahoe County | % of the Total Population | Colorado | U.S. | |
| Arab | 2,190 | 0.45%, see rank | 0.24% | 0.36% |
| Czech | 1,691 | 0.35%, see rank | 0.37% | 0.27% |
| Danish | 3,055 | 0.63%, see rank | 0.61% | 0.30% |
| Dutch | 5,900 | 1.21%, see rank | 1.12% | 0.91% |
| English | 39,421 | 8.08%, see rank | 7.68% | 5.91% |
| French | 10,961 | 2.25%, see rank | 2.24% | 2.39% |
| German | 74,410 | 15.25%, see rank | 15.70% | 10.81% |
| Greek | 2,321 | 0.48%, see rank | 0.28% | 0.34% |
| Hungarian | 1,560 | 0.32%, see rank | 0.27% | 0.32% |
| Irish | 38,704 | 7.93%, see rank | 7.36% | 6.85% |
| Italian | 16,496 | 3.38%, see rank | 3.69% | 4.59% |
| Norwegian | 9,725 | 1.99%, see rank | 1.83% | 1.15% |
| Polish | 8,565 | 1.76%, see rank | 1.56% | 2.24% |
| Portuguese | 563 | 0.12%, see rank | 0.11% | 0.33% |
| Russian | 6,172 | 1.26%, see rank | 0.69% | 0.68% |
| Scotch-Irish | 7,315 | 1.50%, see rank | 1.52% | 1.17% |
| Scottish | 8,675 | 1.78%, see rank | 1.70% | 1.12% |
| Subsaharan African | 4,704 | 0.96%, see rank | 0.38% | 0.61% |
| Swedish | 8,499 | 1.74%, see rank | 1.72% | 0.87% |
| Swiss | 1,288 | 0.26%, see rank | 0.28% | 0.19% |
| Ukrainian | 1,457 | 0.30%, see rank | 0.19% | 0.24% |
| American | 23,118 | 4.74%, see rank | 5.15% | 7.33% |
| Welsh | 2,441 | 0.50%, see rank | 0.49% | 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.