Montgomery County Historical First Ancestry Data
ACS 2010-2014 data
737,603 (91.13%) out of the total population of 809,372 reported first ancestry.
| Montgomery County | % of the Total Population | Pennsylvania | U.S. | |
| Arab | 3,612 | 0.45%, see rank | 0.49% | 0.56% |
| Czech | 2,692 | 0.33%, see rank | 0.40% | 0.47% |
| Danish | 1,560 | 0.19%, see rank | 0.13% | 0.42% |
| Dutch | 10,756 | 1.33%, see rank | 1.76% | 1.40% |
| English | 69,036 | 8.53%, see rank | 7.42% | 8.02% |
| French | 16,658 | 2.06%, see rank | 1.87% | 3.34% |
| German | 193,500 | 23.91%, see rank | 27.27% | 15.03% |
| Greek | 3,844 | 0.47%, see rank | 0.50% | 0.41% |
| Hungarian | 7,673 | 0.95%, see rank | 1.03% | 0.46% |
| Irish | 178,561 | 22.06%, see rank | 16.97% | 10.80% |
| Italian | 124,953 | 15.44%, see rank | 12.13% | 5.52% |
| Norwegian | 3,201 | 0.40%, see rank | 0.33% | 1.42% |
| Polish | 55,696 | 6.88%, see rank | 6.62% | 3.01% |
| Portuguese | 1,506 | 0.19%, see rank | 0.15% | 0.44% |
| Russian | 25,955 | 3.21%, see rank | 1.47% | 0.92% |
| Scotch-Irish | 6,979 | 0.86%, see rank | 1.18% | 0.99% |
| Scottish | 13,162 | 1.63%, see rank | 1.50% | 1.72% |
| Subsaharan African | 4,264 | 0.53%, see rank | 0.74% | 0.95% |
| Swedish | 6,037 | 0.75%, see rank | 0.82% | 1.27% |
| Swiss | 3,264 | 0.40%, see rank | 0.51% | 0.30% |
| Ukrainian | 9,355 | 1.16%, see rank | 0.88% | 0.31% |
| American | 33,582 | 4.15%, see rank | 5.22% | 7.12% |
| Welsh | 8,914 | 1.10%, see rank | 1.30% | 0.57% |
ACS 2008-2012 data
740,471 (92.57%) out of the total population of 799,886 reported first ancestry.
| Montgomery County | % of the Total Population | Pennsylvania | U.S. | |
| Arab | 4,195 | 0.52%, see rank | 0.49% | 0.53% |
| Czech | 3,288 | 0.41%, see rank | 0.44% | 0.50% |
| Danish | 1,869 | 0.23%, see rank | 0.14% | 0.45% |
| Dutch | 11,440 | 1.43%, see rank | 1.94% | 1.51% |
| English | 72,995 | 9.13%, see rank | 7.94% | 8.53% |
| French | 16,220 | 2.03%, see rank | 1.99% | 3.54% |
| German | 196,110 | 24.52%, see rank | 28.44% | 15.79% |
| Greek | 3,814 | 0.48%, see rank | 0.51% | 0.42% |
| Hungarian | 8,110 | 1.01%, see rank | 1.08% | 0.48% |
| Irish | 180,920 | 22.62%, see rank | 17.65% | 11.36% |
| Italian | 122,994 | 15.38%, see rank | 12.26% | 5.66% |
| Norwegian | 3,231 | 0.40%, see rank | 0.34% | 1.46% |
| Polish | 57,322 | 7.17%, see rank | 6.78% | 3.13% |
| Portuguese | 1,629 | 0.20%, see rank | 0.15% | 0.46% |
| Russian | 27,528 | 3.44%, see rank | 1.53% | 0.97% |
| Scotch-Irish | 7,998 | 1.00%, see rank | 1.30% | 1.07% |
| Scottish | 13,359 | 1.67%, see rank | 1.58% | 1.81% |
| Subsaharan African | 3,892 | 0.49%, see rank | 0.68% | 0.93% |
| Swedish | 5,997 | 0.75%, see rank | 0.85% | 1.34% |
| Swiss | 3,226 | 0.40%, see rank | 0.55% | 0.31% |
| Ukrainian | 9,298 | 1.16%, see rank | 0.91% | 0.31% |
| American | 30,510 | 3.81%, see rank | 4.84% | 6.72% |
| Welsh | 9,365 | 1.17%, see rank | 1.41% | 0.60% |
ACS 2006-2010 data
736,015 (93.11%) out of the total population of 790,497 reported first ancestry.
| Montgomery County | % of the Total Population | Pennsylvania | U.S. | |
| Arab | 3,723 | 0.47%, see rank | 0.47% | 0.50% |
| Czech | 3,333 | 0.42%, see rank | 0.46% | 0.53% |
| Danish | 1,426 | 0.18%, see rank | 0.15% | 0.48% |
| Dutch | 12,229 | 1.55%, see rank | 2.13% | 1.63% |
| English | 74,751 | 9.46%, see rank | 8.35% | 9.02% |
| French | 16,334 | 2.07%, see rank | 2.11% | 3.77% |
| German | 200,167 | 25.32%, see rank | 29.39% | 16.51% |
| Greek | 4,143 | 0.52%, see rank | 0.53% | 0.44% |
| Hungarian | 8,581 | 1.09%, see rank | 1.15% | 0.51% |
| Irish | 178,537 | 22.59%, see rank | 17.85% | 11.76% |
| Italian | 124,035 | 15.69%, see rank | 12.51% | 5.78% |
| Norwegian | 3,383 | 0.43%, see rank | 0.34% | 1.51% |
| Polish | 55,685 | 7.04%, see rank | 6.98% | 3.24% |
| Portuguese | 1,604 | 0.20%, see rank | 0.15% | 0.47% |
| Russian | 27,696 | 3.50%, see rank | 1.60% | 1.01% |
| Scotch-Irish | 14,136 | 1.79%, see rank | 1.99% | 1.72% |
| Scottish | 14,132 | 1.79%, see rank | 1.67% | 1.92% |
| Subsaharan African | 4,068 | 0.51%, see rank | 0.65% | 0.91% |
| Swedish | 6,244 | 0.79%, see rank | 0.91% | 1.41% |
| Swiss | 3,643 | 0.46%, see rank | 0.57% | 0.33% |
| Ukrainian | 9,507 | 1.20%, see rank | 0.94% | 0.31% |
| American | 28,494 | 3.60%, see rank | 4.36% | 6.28% |
| Welsh | 9,701 | 1.23%, see rank | 1.49% | 0.63% |
ACS 2005-2009 data
723,727 (93.23%) out of the total population of 776,306 reported first ancestry.
| Montgomery County | % of the Total Population | Pennsylvania | U.S. | |
| Arab | 3,732 | 0.48%, see rank | 0.47% | 0.50% |
| Czech | 3,302 | 0.43%, see rank | 0.47% | 0.54% |
| Danish | 1,370 | 0.18%, see rank | 0.16% | 0.49% |
| Dutch | 12,161 | 1.57%, see rank | 2.21% | 1.68% |
| English | 74,249 | 9.56%, see rank | 8.53% | 9.29% |
| French | 16,564 | 2.13%, see rank | 2.15% | 3.90% |
| German | 199,058 | 25.64%, see rank | 29.85% | 16.89% |
| Greek | 3,969 | 0.51%, see rank | 0.53% | 0.45% |
| Hungarian | 8,788 | 1.13%, see rank | 1.17% | 0.52% |
| Irish | 180,244 | 23.22%, see rank | 18.11% | 12.01% |
| Italian | 123,489 | 15.91%, see rank | 12.73% | 5.91% |
| Norwegian | 3,625 | 0.47%, see rank | 0.35% | 1.55% |
| Polish | 55,052 | 7.09%, see rank | 7.14% | 3.32% |
| Portuguese | 1,466 | 0.19%, see rank | 0.15% | 0.48% |
| Russian | 28,356 | 3.65%, see rank | 1.65% | 1.04% |
| Scotch-Irish | 14,537 | 1.87%, see rank | 2.06% | 1.77% |
| Scottish | 14,137 | 1.82%, see rank | 1.70% | 1.97% |
| Subsaharan African | 4,276 | 0.55%, see rank | 0.64% | 0.88% |
| Swedish | 6,405 | 0.83%, see rank | 0.93% | 1.45% |
| Swiss | 4,006 | 0.52%, see rank | 0.58% | 0.34% |
| Ukrainian | 9,613 | 1.24%, see rank | 0.98% | 0.32% |
| American | 29,983 | 3.86%, see rank | 4.49% | 6.43% |
| Welsh | 10,057 | 1.30%, see rank | 1.52% | 0.65% |
US Census 2000 data
641,531 (85.53%) out of the total population of 750,097 reported first ancestry.
| Montgomery County | % of the Total Population | Pennsylvania | U.S. | |
| Arab | 2,196 | 0.29%, see rank | 0.32% | 0.36% |
| Czech | 845 | 0.11%, see rank | 0.17% | 0.27% |
| Danish | 790 | 0.11%, see rank | 0.08% | 0.30% |
| Dutch | 6,406 | 0.85%, see rank | 0.99% | 0.91% |
| English | 41,847 | 5.58%, see rank | 4.75% | 5.91% |
| French | 8,103 | 1.08%, see rank | 1.05% | 2.39% |
| German | 118,349 | 15.78%, see rank | 19.14% | 10.81% |
| Greek | 2,640 | 0.35%, see rank | 0.37% | 0.34% |
| Hungarian | 4,744 | 0.63%, see rank | 0.66% | 0.32% |
| Irish | 107,226 | 14.29%, see rank | 10.11% | 6.85% |
| Italian | 92,013 | 12.27%, see rank | 9.55% | 4.59% |
| Norwegian | 2,685 | 0.36%, see rank | 0.22% | 1.15% |
| Polish | 32,009 | 4.27%, see rank | 4.74% | 2.24% |
| Portuguese | 1,000 | 0.13%, see rank | 0.08% | 0.33% |
| Russian | 21,896 | 2.92%, see rank | 1.04% | 0.68% |
| Scotch-Irish | 8,406 | 1.12%, see rank | 1.29% | 1.17% |
| Scottish | 7,583 | 1.01%, see rank | 0.93% | 1.12% |
| Subsaharan African | 3,127 | 0.42%, see rank | 0.46% | 0.61% |
| Swedish | 3,569 | 0.48%, see rank | 0.51% | 0.87% |
| Swiss | 2,477 | 0.33%, see rank | 0.31% | 0.19% |
| Ukrainian | 6,097 | 0.81%, see rank | 0.72% | 0.24% |
| American | 29,954 | 3.99%, see rank | 5.16% | 7.33% |
| Welsh | 4,269 | 0.57%, see rank | 0.72% | 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.