Thornton, CO Historical First Ancestry Data
ACS 2010-2014 data
112,722 (90.39%) out of the total population of 124,707 reported first ancestry.
| Thornton, CO | % of the Total Population | Colorado | U.S. | |
| Arab | 295 | 0.24%, see rank | 0.39% | 0.56% |
| Czech | 857 | 0.69%, see rank | 0.70% | 0.47% |
| Danish | 683 | 0.55%, see rank | 0.82% | 0.42% |
| Dutch | 1,677 | 1.34%, see rank | 1.81% | 1.40% |
| English | 8,953 | 7.18%, see rank | 10.49% | 8.02% |
| French | 3,043 | 2.44%, see rank | 3.48% | 3.34% |
| German | 23,513 | 18.85%, see rank | 20.88% | 15.03% |
| Greek | 308 | 0.25%, see rank | 0.38% | 0.41% |
| Hungarian | 394 | 0.32%, see rank | 0.39% | 0.46% |
| Irish | 12,965 | 10.40%, see rank | 12.04% | 10.80% |
| Italian | 6,655 | 5.34%, see rank | 5.10% | 5.52% |
| Norwegian | 2,628 | 2.11%, see rank | 2.18% | 1.42% |
| Polish | 2,412 | 1.93%, see rank | 2.51% | 3.01% |
| Portuguese | 159 | 0.13%, see rank | 0.21% | 0.44% |
| Russian | 884 | 0.71%, see rank | 1.09% | 0.92% |
| Scotch-Irish | 1,126 | 0.90%, see rank | 1.27% | 0.99% |
| Scottish | 2,776 | 2.23%, see rank | 2.56% | 1.72% |
| Subsaharan African | 399 | 0.32%, see rank | 0.73% | 0.95% |
| Swedish | 2,787 | 2.23%, see rank | 2.43% | 1.27% |
| Swiss | 415 | 0.33%, see rank | 0.46% | 0.30% |
| Ukrainian | 270 | 0.22%, see rank | 0.25% | 0.31% |
| American | 11,118 | 8.92%, see rank | 5.18% | 7.12% |
| Welsh | 1,025 | 0.82%, see rank | 0.92% | 0.57% |
ACS 2008-2012 data
109,032 (91.82%) out of the total population of 118,747 reported first ancestry.
| Thornton, CO | % of the Total Population | Colorado | U.S. | |
| Arab | 393 | 0.33%, see rank | 0.36% | 0.53% |
| Czech | 950 | 0.80%, see rank | 0.73% | 0.50% |
| Danish | 498 | 0.42%, see rank | 0.90% | 0.45% |
| Dutch | 1,963 | 1.65%, see rank | 1.91% | 1.51% |
| English | 9,630 | 8.11%, see rank | 11.19% | 8.53% |
| French | 3,444 | 2.90%, see rank | 3.75% | 3.54% |
| German | 23,252 | 19.58%, see rank | 22.06% | 15.79% |
| Greek | 331 | 0.28%, see rank | 0.40% | 0.42% |
| Hungarian | 346 | 0.29%, see rank | 0.42% | 0.48% |
| Irish | 12,451 | 10.49%, see rank | 12.52% | 11.36% |
| Italian | 5,896 | 4.97%, see rank | 5.22% | 5.66% |
| Norwegian | 2,371 | 2.00%, see rank | 2.26% | 1.46% |
| Polish | 2,741 | 2.31%, see rank | 2.55% | 3.13% |
| Portuguese | 180 | 0.15%, see rank | 0.20% | 0.46% |
| Russian | 772 | 0.65%, see rank | 1.15% | 0.97% |
| Scotch-Irish | 1,030 | 0.87%, see rank | 1.37% | 1.07% |
| Scottish | 2,910 | 2.45%, see rank | 2.69% | 1.81% |
| Subsaharan African | 204 | 0.17%, see rank | 0.64% | 0.93% |
| Swedish | 2,700 | 2.27%, see rank | 2.64% | 1.34% |
| Swiss | 471 | 0.40%, see rank | 0.48% | 0.31% |
| Ukrainian | 91 | 0.08%, see rank | 0.25% | 0.31% |
| American | 10,656 | 8.97%, see rank | 4.88% | 6.72% |
| Welsh | 892 | 0.75%, see rank | 0.93% | 0.60% |
ACS 2006-2010 data
104,767 (93.23%) out of the total population of 112,374 reported first ancestry.
| Thornton, CO | % of the Total Population | Colorado | U.S. | |
| Arab | 390 | 0.35%, see rank | 0.33% | 0.50% |
| Czech | 826 | 0.74%, see rank | 0.78% | 0.53% |
| Danish | 580 | 0.52%, see rank | 0.95% | 0.48% |
| Dutch | 1,810 | 1.61%, see rank | 1.98% | 1.63% |
| English | 10,031 | 8.93%, see rank | 11.90% | 9.02% |
| French | 3,597 | 3.20%, see rank | 3.96% | 3.77% |
| German | 23,953 | 21.32%, see rank | 22.99% | 16.51% |
| Greek | 348 | 0.31%, see rank | 0.40% | 0.44% |
| Hungarian | 432 | 0.38%, see rank | 0.43% | 0.51% |
| Irish | 12,458 | 11.09%, see rank | 12.87% | 11.76% |
| Italian | 5,830 | 5.19%, see rank | 5.18% | 5.78% |
| Norwegian | 2,365 | 2.10%, see rank | 2.34% | 1.51% |
| Polish | 2,755 | 2.45%, see rank | 2.54% | 3.24% |
| Portuguese | 282 | 0.25%, see rank | 0.22% | 0.47% |
| Russian | 892 | 0.79%, see rank | 1.23% | 1.01% |
| Scotch-Irish | 2,056 | 1.83%, see rank | 2.21% | 1.72% |
| Scottish | 2,687 | 2.39%, see rank | 2.86% | 1.92% |
| Subsaharan African | 316 | 0.28%, see rank | 0.55% | 0.91% |
| Swedish | 2,664 | 2.37%, see rank | 2.81% | 1.41% |
| Swiss | 326 | 0.29%, see rank | 0.52% | 0.33% |
| Ukrainian | 200 | 0.18%, see rank | 0.27% | 0.31% |
| American | 7,889 | 7.02%, see rank | 4.46% | 6.28% |
| Welsh | 864 | 0.77%, see rank | 0.96% | 0.63% |
ACS 2005-2009 data
103,489 (93.43%) out of the total population of 110,768 reported first ancestry.
| Thornton, CO | % of the Total Population | Colorado | U.S. | |
| Arab | 487 | 0.44%, see rank | 0.33% | 0.50% |
| Czech | 1,060 | 0.96%, see rank | 0.80% | 0.54% |
| Danish | 650 | 0.59%, see rank | 0.99% | 0.49% |
| Dutch | 1,918 | 1.73%, see rank | 2.06% | 1.68% |
| English | 10,955 | 9.89%, see rank | 12.26% | 9.29% |
| French | 4,074 | 3.68%, see rank | 4.07% | 3.90% |
| German | 25,916 | 23.40%, see rank | 23.49% | 16.89% |
| Greek | 347 | 0.31%, see rank | 0.42% | 0.45% |
| Hungarian | 397 | 0.36%, see rank | 0.45% | 0.52% |
| Irish | 13,448 | 12.14%, see rank | 13.00% | 12.01% |
| Italian | 5,915 | 5.34%, see rank | 5.20% | 5.91% |
| Norwegian | 2,708 | 2.44%, see rank | 2.40% | 1.55% |
| Polish | 3,545 | 3.20%, see rank | 2.56% | 3.32% |
| Portuguese | 251 | 0.23%, see rank | 0.22% | 0.48% |
| Russian | 1,038 | 0.94%, see rank | 1.28% | 1.04% |
| Scotch-Irish | 2,308 | 2.08%, see rank | 2.31% | 1.77% |
| Scottish | 2,520 | 2.28%, see rank | 2.90% | 1.97% |
| Subsaharan African | 434 | 0.39%, see rank | 0.55% | 0.88% |
| Swedish | 2,863 | 2.58%, see rank | 2.84% | 1.45% |
| Swiss | 273 | 0.25%, see rank | 0.50% | 0.34% |
| Ukrainian | 333 | 0.30%, see rank | 0.27% | 0.32% |
| American | 6,721 | 6.07%, see rank | 4.64% | 6.43% |
| Welsh | 845 | 0.76%, see rank | 0.99% | 0.65% |
US Census 2000 data
68,421 (83.05%) out of the total population of 82,384 reported first ancestry.
| Thornton, CO | % of the Total Population | Colorado | U.S. | |
| Arab | 161 | 0.20%, see rank | 0.24% | 0.36% |
| Czech | 439 | 0.53%, see rank | 0.37% | 0.27% |
| Danish | 447 | 0.54%, see rank | 0.61% | 0.30% |
| Dutch | 842 | 1.02%, see rank | 1.12% | 0.91% |
| English | 5,087 | 6.17%, see rank | 7.68% | 5.91% |
| French | 1,904 | 2.31%, see rank | 2.24% | 2.39% |
| German | 13,888 | 16.86%, see rank | 15.70% | 10.81% |
| Greek | 287 | 0.35%, see rank | 0.28% | 0.34% |
| Hungarian | 219 | 0.27%, see rank | 0.27% | 0.32% |
| Irish | 6,364 | 7.72%, see rank | 7.36% | 6.85% |
| Italian | 3,659 | 4.44%, see rank | 3.69% | 4.59% |
| Norwegian | 1,610 | 1.95%, see rank | 1.83% | 1.15% |
| Polish | 1,299 | 1.58%, see rank | 1.56% | 2.24% |
| Portuguese | 118 | 0.14%, see rank | 0.11% | 0.33% |
| Russian | 343 | 0.42%, see rank | 0.69% | 0.68% |
| Scotch-Irish | 1,094 | 1.33%, see rank | 1.52% | 1.17% |
| Scottish | 909 | 1.10%, see rank | 1.70% | 1.12% |
| Subsaharan African | 280 | 0.34%, see rank | 0.38% | 0.61% |
| Swedish | 1,311 | 1.59%, see rank | 1.72% | 0.87% |
| Swiss | 203 | 0.25%, see rank | 0.28% | 0.19% |
| Ukrainian | 120 | 0.15%, see rank | 0.19% | 0.24% |
| American | 3,939 | 4.78%, see rank | 5.15% | 7.33% |
| Welsh | 417 | 0.51%, 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.