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San Luis Obispo County Historical First Ancestry Data
ACS 2010-2014 data
241,617 (88.12%) out of the total population of 274,184 reported first ancestry.
| San Luis Obispo County | % of the Total Population | California | U.S. | |
| Arab | 1,375 | 0.50%, see rank | 0.72% | 0.56% |
| Czech | 855 | 0.31%, see rank | 0.22% | 0.47% |
| Danish | 2,939 | 1.07%, see rank | 0.46% | 0.42% |
| Dutch | 6,065 | 2.21%, see rank | 0.99% | 1.40% |
| English | 32,749 | 11.94%, see rank | 5.94% | 8.02% |
| French | 10,824 | 3.95%, see rank | 2.15% | 3.34% |
| German | 44,960 | 16.40%, see rank | 8.51% | 15.03% |
| Greek | 1,238 | 0.45%, see rank | 0.35% | 0.41% |
| Hungarian | 1,447 | 0.53%, see rank | 0.32% | 0.46% |
| Irish | 32,823 | 11.97%, see rank | 6.69% | 10.80% |
| Italian | 16,989 | 6.20%, see rank | 3.97% | 5.52% |
| Norwegian | 5,972 | 2.18%, see rank | 1.02% | 1.42% |
| Polish | 5,830 | 2.13%, see rank | 1.32% | 3.01% |
| Portuguese | 6,137 | 2.24%, see rank | 0.91% | 0.44% |
| Russian | 2,911 | 1.06%, see rank | 1.13% | 0.92% |
| Scotch-Irish | 3,733 | 1.36%, see rank | 0.61% | 0.99% |
| Scottish | 6,985 | 2.55%, see rank | 1.34% | 1.72% |
| Subsaharan African | 523 | 0.19%, see rank | 0.69% | 0.95% |
| Swedish | 5,732 | 2.09%, see rank | 1.09% | 1.27% |
| Swiss | 2,146 | 0.78%, see rank | 0.27% | 0.30% |
| Ukrainian | 472 | 0.17%, see rank | 0.27% | 0.31% |
| American | 13,691 | 4.99%, see rank | 3.22% | 7.12% |
| Welsh | 2,772 | 1.01%, see rank | 0.43% | 0.57% |
ACS 2008-2012 data
243,578 (90.17%) out of the total population of 270,121 reported first ancestry.
| San Luis Obispo County | % of the Total Population | California | U.S. | |
| Arab | 1,450 | 0.54%, see rank | 0.70% | 0.53% |
| Czech | 1,067 | 0.40%, see rank | 0.24% | 0.50% |
| Danish | 3,517 | 1.30%, see rank | 0.50% | 0.45% |
| Dutch | 6,108 | 2.26%, see rank | 1.08% | 1.51% |
| English | 35,084 | 12.99%, see rank | 6.39% | 8.53% |
| French | 10,666 | 3.95%, see rank | 2.28% | 3.54% |
| German | 46,000 | 17.03%, see rank | 9.10% | 15.79% |
| Greek | 1,060 | 0.39%, see rank | 0.35% | 0.42% |
| Hungarian | 1,425 | 0.53%, see rank | 0.34% | 0.48% |
| Irish | 32,220 | 11.93%, see rank | 7.13% | 11.36% |
| Italian | 16,464 | 6.10%, see rank | 4.08% | 5.66% |
| Norwegian | 5,934 | 2.20%, see rank | 1.06% | 1.46% |
| Polish | 5,022 | 1.86%, see rank | 1.35% | 3.13% |
| Portuguese | 6,187 | 2.29%, see rank | 0.96% | 0.46% |
| Russian | 3,030 | 1.12%, see rank | 1.18% | 0.97% |
| Scotch-Irish | 4,043 | 1.50%, see rank | 0.67% | 1.07% |
| Scottish | 8,439 | 3.12%, see rank | 1.43% | 1.81% |
| Subsaharan African | 548 | 0.20%, see rank | 0.72% | 0.93% |
| Swedish | 5,835 | 2.16%, see rank | 1.16% | 1.34% |
| Swiss | 2,501 | 0.93%, see rank | 0.28% | 0.31% |
| Ukrainian | 516 | 0.19%, see rank | 0.26% | 0.31% |
| American | 13,442 | 4.98%, see rank | 2.78% | 6.72% |
| Welsh | 2,834 | 1.05%, see rank | 0.46% | 0.60% |
ACS 2006-2010 data
240,429 (90.53%) out of the total population of 265,577 reported first ancestry.
| San Luis Obispo County | % of the Total Population | California | U.S. | |
| Arab | 1,317 | 0.50%, see rank | 0.66% | 0.50% |
| Czech | 1,516 | 0.57%, see rank | 0.26% | 0.53% |
| Danish | 3,697 | 1.39%, see rank | 0.53% | 0.48% |
| Dutch | 6,302 | 2.37%, see rank | 1.15% | 1.63% |
| English | 34,599 | 13.03%, see rank | 6.77% | 9.02% |
| French | 10,948 | 4.12%, see rank | 2.44% | 3.77% |
| German | 46,063 | 17.34%, see rank | 9.60% | 16.51% |
| Greek | 1,306 | 0.49%, see rank | 0.38% | 0.44% |
| Hungarian | 1,374 | 0.52%, see rank | 0.36% | 0.51% |
| Irish | 32,940 | 12.40%, see rank | 7.50% | 11.76% |
| Italian | 16,261 | 6.12%, see rank | 4.21% | 5.78% |
| Norwegian | 5,984 | 2.25%, see rank | 1.10% | 1.51% |
| Polish | 5,268 | 1.98%, see rank | 1.41% | 3.24% |
| Portuguese | 6,139 | 2.31%, see rank | 1.02% | 0.47% |
| Russian | 3,074 | 1.16%, see rank | 1.22% | 1.01% |
| Scotch-Irish | 6,839 | 2.58%, see rank | 1.19% | 1.72% |
| Scottish | 8,607 | 3.24%, see rank | 1.54% | 1.92% |
| Subsaharan African | 562 | 0.21%, see rank | 0.72% | 0.91% |
| Swedish | 6,459 | 2.43%, see rank | 1.25% | 1.41% |
| Swiss | 2,740 | 1.03%, see rank | 0.31% | 0.33% |
| Ukrainian | 443 | 0.17%, see rank | 0.26% | 0.31% |
| American | 9,767 | 3.68%, see rank | 2.43% | 6.28% |
| Welsh | 2,712 | 1.02%, see rank | 0.49% | 0.63% |
ACS 2005-2009 data
238,485 (90.97%) out of the total population of 262,149 reported first ancestry.
| San Luis Obispo County | % of the Total Population | California | U.S. | |
| Arab | 770 | 0.29%, see rank | 0.66% | 0.50% |
| Czech | 1,594 | 0.61%, see rank | 0.27% | 0.54% |
| Danish | 3,563 | 1.36%, see rank | 0.55% | 0.49% |
| Dutch | 6,128 | 2.34%, see rank | 1.19% | 1.68% |
| English | 35,709 | 13.62%, see rank | 7.02% | 9.29% |
| French | 11,389 | 4.34%, see rank | 2.56% | 3.90% |
| German | 47,325 | 18.05%, see rank | 9.93% | 16.89% |
| Greek | 1,155 | 0.44%, see rank | 0.38% | 0.45% |
| Hungarian | 1,368 | 0.52%, see rank | 0.37% | 0.52% |
| Irish | 32,794 | 12.51%, see rank | 7.79% | 12.01% |
| Italian | 15,885 | 6.06%, see rank | 4.33% | 5.91% |
| Norwegian | 5,770 | 2.20%, see rank | 1.14% | 1.55% |
| Polish | 5,306 | 2.02%, see rank | 1.45% | 3.32% |
| Portuguese | 6,021 | 2.30%, see rank | 1.05% | 0.48% |
| Russian | 3,053 | 1.16%, see rank | 1.25% | 1.04% |
| Scotch-Irish | 6,788 | 2.59%, see rank | 1.23% | 1.77% |
| Scottish | 8,798 | 3.36%, see rank | 1.61% | 1.97% |
| Subsaharan African | 564 | 0.22%, see rank | 0.71% | 0.88% |
| Swedish | 6,303 | 2.40%, see rank | 1.28% | 1.45% |
| Swiss | 2,598 | 0.99%, see rank | 0.32% | 0.34% |
| Ukrainian | 439 | 0.17%, see rank | 0.27% | 0.32% |
| American | 9,451 | 3.61%, see rank | 2.66% | 6.43% |
| Welsh | 2,445 | 0.93%, see rank | 0.52% | 0.65% |
US Census 2000 data
198,827 (80.60%) out of the total population of 246,681 reported first ancestry.
| San Luis Obispo County | % of the Total Population | California | U.S. | |
| Arab | 637 | 0.26%, see rank | 0.50% | 0.36% |
| Czech | 480 | 0.19%, see rank | 0.14% | 0.27% |
| Danish | 2,121 | 0.86%, see rank | 0.38% | 0.30% |
| Dutch | 3,075 | 1.25%, see rank | 0.71% | 0.91% |
| English | 22,590 | 9.16%, see rank | 4.91% | 5.91% |
| French | 5,987 | 2.43%, see rank | 1.57% | 2.39% |
| German | 27,714 | 11.23%, see rank | 6.45% | 10.81% |
| Greek | 727 | 0.29%, see rank | 0.29% | 0.34% |
| Hungarian | 695 | 0.28%, see rank | 0.27% | 0.32% |
| Irish | 19,369 | 7.85%, see rank | 4.72% | 6.85% |
| Italian | 11,401 | 4.62%, see rank | 3.41% | 4.59% |
| Norwegian | 4,343 | 1.76%, see rank | 0.92% | 1.15% |
| Polish | 2,544 | 1.03%, see rank | 0.95% | 2.24% |
| Portuguese | 3,746 | 1.52%, see rank | 0.75% | 0.33% |
| Russian | 1,635 | 0.66%, see rank | 0.90% | 0.68% |
| Scotch-Irish | 3,651 | 1.48%, see rank | 0.87% | 1.17% |
| Scottish | 4,919 | 1.99%, see rank | 1.00% | 1.12% |
| Subsaharan African | 370 | 0.15%, see rank | 0.51% | 0.61% |
| Swedish | 3,292 | 1.33%, see rank | 0.86% | 0.87% |
| Swiss | 1,932 | 0.78%, see rank | 0.21% | 0.19% |
| Ukrainian | 296 | 0.12%, see rank | 0.20% | 0.24% |
| American | 12,135 | 4.92%, see rank | 3.37% | 7.33% |
| Welsh | 1,249 | 0.51%, see rank | 0.27% | 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.