Nassau County Historical First Ancestry Data
ACS 2010-2014 data
1,215,746 (90.02%) out of the total population of 1,350,601 reported first ancestry.
| Nassau County | % of the Total Population | New York | U.S. | |
| Arab | 7,617 | 0.56%, see rank | 0.81% | 0.56% |
| Czech | 4,448 | 0.33%, see rank | 0.28% | 0.47% |
| Danish | 1,559 | 0.12%, see rank | 0.18% | 0.42% |
| Dutch | 5,416 | 0.40%, see rank | 1.25% | 1.40% |
| English | 38,807 | 2.87%, see rank | 5.38% | 8.02% |
| French | 15,722 | 1.16%, see rank | 2.93% | 3.34% |
| German | 129,214 | 9.57%, see rank | 10.62% | 15.03% |
| Greek | 21,321 | 1.58%, see rank | 0.77% | 0.41% |
| Hungarian | 11,202 | 0.83%, see rank | 0.76% | 0.46% |
| Irish | 211,185 | 15.64%, see rank | 12.41% | 10.80% |
| Italian | 282,969 | 20.95%, see rank | 13.28% | 5.52% |
| Norwegian | 5,816 | 0.43%, see rank | 0.42% | 1.42% |
| Polish | 67,451 | 4.99%, see rank | 4.82% | 3.01% |
| Portuguese | 6,576 | 0.49%, see rank | 0.27% | 0.44% |
| Russian | 51,484 | 3.81%, see rank | 2.21% | 0.92% |
| Scotch-Irish | 3,074 | 0.23%, see rank | 0.35% | 0.99% |
| Scottish | 7,396 | 0.55%, see rank | 1.06% | 1.72% |
| Subsaharan African | 6,918 | 0.51%, see rank | 1.27% | 0.95% |
| Swedish | 6,943 | 0.51%, see rank | 0.62% | 1.27% |
| Swiss | 1,806 | 0.13%, see rank | 0.18% | 0.30% |
| Ukrainian | 6,288 | 0.47%, see rank | 0.69% | 0.31% |
| American | 60,432 | 4.47%, see rank | 5.03% | 7.12% |
| Welsh | 1,801 | 0.13%, see rank | 0.42% | 0.57% |
ACS 2008-2012 data
1,235,675 (92.30%) out of the total population of 1,338,712 reported first ancestry.
| Nassau County | % of the Total Population | New York | U.S. | |
| Arab | 7,349 | 0.55%, see rank | 0.79% | 0.53% |
| Czech | 4,719 | 0.35%, see rank | 0.29% | 0.50% |
| Danish | 2,066 | 0.15%, see rank | 0.18% | 0.45% |
| Dutch | 5,056 | 0.38%, see rank | 1.35% | 1.51% |
| English | 41,524 | 3.10%, see rank | 5.77% | 8.53% |
| French | 17,211 | 1.29%, see rank | 3.12% | 3.54% |
| German | 137,612 | 10.28%, see rank | 11.22% | 15.79% |
| Greek | 21,815 | 1.63%, see rank | 0.82% | 0.42% |
| Hungarian | 12,083 | 0.90%, see rank | 0.78% | 0.48% |
| Irish | 222,225 | 16.60%, see rank | 13.03% | 11.36% |
| Italian | 295,611 | 22.08%, see rank | 13.84% | 5.66% |
| Norwegian | 5,375 | 0.40%, see rank | 0.43% | 1.46% |
| Polish | 69,972 | 5.23%, see rank | 5.08% | 3.13% |
| Portuguese | 7,364 | 0.55%, see rank | 0.28% | 0.46% |
| Russian | 55,773 | 4.17%, see rank | 2.41% | 0.97% |
| Scotch-Irish | 3,555 | 0.27%, see rank | 0.38% | 1.07% |
| Scottish | 7,775 | 0.58%, see rank | 1.11% | 1.81% |
| Subsaharan African | 6,374 | 0.48%, see rank | 1.24% | 0.93% |
| Swedish | 7,141 | 0.53%, see rank | 0.66% | 1.34% |
| Swiss | 2,213 | 0.17%, see rank | 0.20% | 0.31% |
| Ukrainian | 5,834 | 0.44%, see rank | 0.69% | 0.31% |
| American | 51,094 | 3.82%, see rank | 4.21% | 6.72% |
| Welsh | 1,761 | 0.13%, see rank | 0.45% | 0.60% |
ACS 2006-2010 data
1,246,220 (93.77%) out of the total population of 1,329,083 reported first ancestry.
| Nassau County | % of the Total Population | New York | U.S. | |
| Arab | 7,449 | 0.56%, see rank | 0.74% | 0.50% |
| Czech | 4,825 | 0.36%, see rank | 0.30% | 0.53% |
| Danish | 2,201 | 0.17%, see rank | 0.18% | 0.48% |
| Dutch | 5,539 | 0.42%, see rank | 1.44% | 1.63% |
| English | 42,066 | 3.17%, see rank | 6.14% | 9.02% |
| French | 18,820 | 1.42%, see rank | 3.33% | 3.77% |
| German | 143,811 | 10.82%, see rank | 11.71% | 16.51% |
| Greek | 21,516 | 1.62%, see rank | 0.85% | 0.44% |
| Hungarian | 13,637 | 1.03%, see rank | 0.80% | 0.51% |
| Irish | 224,840 | 16.92%, see rank | 13.34% | 11.76% |
| Italian | 305,737 | 23.00%, see rank | 14.20% | 5.78% |
| Norwegian | 6,174 | 0.46%, see rank | 0.45% | 1.51% |
| Polish | 72,081 | 5.42%, see rank | 5.24% | 3.24% |
| Portuguese | 7,340 | 0.55%, see rank | 0.28% | 0.47% |
| Russian | 59,061 | 4.44%, see rank | 2.47% | 1.01% |
| Scotch-Irish | 8,938 | 0.67%, see rank | 0.86% | 1.72% |
| Scottish | 8,512 | 0.64%, see rank | 1.18% | 1.92% |
| Subsaharan African | 7,176 | 0.54%, see rank | 1.24% | 0.91% |
| Swedish | 7,946 | 0.60%, see rank | 0.69% | 1.41% |
| Swiss | 2,316 | 0.17%, see rank | 0.20% | 0.33% |
| Ukrainian | 5,868 | 0.44%, see rank | 0.69% | 0.31% |
| American | 42,503 | 3.20%, see rank | 3.58% | 6.28% |
| Welsh | 1,755 | 0.13%, see rank | 0.46% | 0.63% |
ACS 2005-2009 data
1,275,616 (94.20%) out of the total population of 1,354,141 reported first ancestry.
| Nassau County | % of the Total Population | New York | U.S. | |
| Arab | 7,376 | 0.54%, see rank | 0.75% | 0.50% |
| Czech | 5,127 | 0.38%, see rank | 0.31% | 0.54% |
| Danish | 2,484 | 0.18%, see rank | 0.19% | 0.49% |
| Dutch | 6,242 | 0.46%, see rank | 1.46% | 1.68% |
| English | 46,252 | 3.42%, see rank | 6.30% | 9.29% |
| French | 19,845 | 1.47%, see rank | 3.38% | 3.90% |
| German | 151,937 | 11.22%, see rank | 11.88% | 16.89% |
| Greek | 22,971 | 1.70%, see rank | 0.89% | 0.45% |
| Hungarian | 14,799 | 1.09%, see rank | 0.82% | 0.52% |
| Irish | 235,622 | 17.40%, see rank | 13.54% | 12.01% |
| Italian | 322,330 | 23.80%, see rank | 14.66% | 5.91% |
| Norwegian | 6,186 | 0.46%, see rank | 0.47% | 1.55% |
| Polish | 72,877 | 5.38%, see rank | 5.31% | 3.32% |
| Portuguese | 7,892 | 0.58%, see rank | 0.28% | 0.48% |
| Russian | 60,750 | 4.49%, see rank | 2.56% | 1.04% |
| Scotch-Irish | 9,589 | 0.71%, see rank | 0.87% | 1.77% |
| Scottish | 9,507 | 0.70%, see rank | 1.21% | 1.97% |
| Subsaharan African | 7,265 | 0.54%, see rank | 1.24% | 0.88% |
| Swedish | 7,950 | 0.59%, see rank | 0.70% | 1.45% |
| Swiss | 2,412 | 0.18%, see rank | 0.21% | 0.34% |
| Ukrainian | 6,601 | 0.49%, see rank | 0.72% | 0.32% |
| American | 45,600 | 3.37%, see rank | 3.66% | 6.43% |
| Welsh | 1,645 | 0.12%, see rank | 0.47% | 0.65% |
US Census 2000 data
1,196,590 (89.66%) out of the total population of 1,334,544 reported first ancestry.
| Nassau County | % of the Total Population | New York | U.S. | |
| Arab | 5,254 | 0.39%, see rank | 0.55% | 0.36% |
| Czech | 1,899 | 0.14%, see rank | 0.13% | 0.27% |
| Danish | 1,431 | 0.11%, see rank | 0.12% | 0.30% |
| Dutch | 2,769 | 0.21%, see rank | 0.71% | 0.91% |
| English | 23,326 | 1.75%, see rank | 3.65% | 5.91% |
| French | 8,570 | 0.64%, see rank | 2.01% | 2.39% |
| German | 86,598 | 6.49%, see rank | 6.84% | 10.81% |
| Greek | 17,945 | 1.34%, see rank | 0.72% | 0.34% |
| Hungarian | 8,050 | 0.60%, see rank | 0.47% | 0.32% |
| Irish | 164,198 | 12.30%, see rank | 8.65% | 6.85% |
| Italian | 279,335 | 20.93%, see rank | 12.50% | 4.59% |
| Norwegian | 4,834 | 0.36%, see rank | 0.32% | 1.15% |
| Polish | 48,419 | 3.63%, see rank | 3.71% | 2.24% |
| Portuguese | 5,291 | 0.40%, see rank | 0.18% | 0.33% |
| Russian | 46,212 | 3.46%, see rank | 1.93% | 0.68% |
| Scotch-Irish | 6,246 | 0.47%, see rank | 0.53% | 1.17% |
| Scottish | 6,079 | 0.46%, see rank | 0.67% | 1.12% |
| Subsaharan African | 5,971 | 0.45%, see rank | 0.83% | 0.61% |
| Swedish | 4,597 | 0.34%, see rank | 0.42% | 0.87% |
| Swiss | 1,105 | 0.08%, see rank | 0.12% | 0.19% |
| Ukrainian | 5,140 | 0.39%, see rank | 0.62% | 0.24% |
| American | 59,006 | 4.42%, see rank | 3.78% | 7.33% |
| Welsh | 977 | 0.07%, see rank | 0.21% | 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.