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Castro Valley, CA Historical First Ancestry Data
ACS 2010-2014 data
57,313 (91.90%) out of the total population of 62,363 reported first ancestry.
| Castro Valley, CA | % of the Total Population | California | U.S. | |
| Arab | 451 | 0.72%, see rank | 0.72% | 0.56% |
| Czech | 194 | 0.31%, see rank | 0.22% | 0.47% |
| Danish | 389 | 0.62%, see rank | 0.46% | 0.42% |
| Dutch | 579 | 0.93%, see rank | 0.99% | 1.40% |
| English | 4,301 | 6.90%, see rank | 5.94% | 8.02% |
| French | 1,399 | 2.24%, see rank | 2.15% | 3.34% |
| German | 6,035 | 9.68%, see rank | 8.51% | 15.03% |
| Greek | 690 | 1.11%, see rank | 0.35% | 0.41% |
| Hungarian | 151 | 0.24%, see rank | 0.32% | 0.46% |
| Irish | 4,855 | 7.79%, see rank | 6.69% | 10.80% |
| Italian | 3,464 | 5.55%, see rank | 3.97% | 5.52% |
| Norwegian | 705 | 1.13%, see rank | 1.02% | 1.42% |
| Polish | 1,032 | 1.65%, see rank | 1.32% | 3.01% |
| Portuguese | 2,239 | 3.59%, see rank | 0.91% | 0.44% |
| Russian | 744 | 1.19%, see rank | 1.13% | 0.92% |
| Scotch-Irish | 371 | 0.59%, see rank | 0.61% | 0.99% |
| Scottish | 1,077 | 1.73%, see rank | 1.34% | 1.72% |
| Subsaharan African | 505 | 0.81%, see rank | 0.69% | 0.95% |
| Swedish | 902 | 1.45%, see rank | 1.09% | 1.27% |
| Swiss | 377 | 0.60%, see rank | 0.27% | 0.30% |
| Ukrainian | 165 | 0.26%, see rank | 0.27% | 0.31% |
| American | 1,626 | 2.61%, see rank | 3.22% | 7.12% |
| Welsh | 402 | 0.64%, see rank | 0.43% | 0.57% |
ACS 2008-2012 data
57,450 (94.21%) out of the total population of 60,981 reported first ancestry.
| Castro Valley, CA | % of the Total Population | California | U.S. | |
| Arab | 486 | 0.80%, see rank | 0.70% | 0.53% |
| Czech | 270 | 0.44%, see rank | 0.24% | 0.50% |
| Danish | 379 | 0.62%, see rank | 0.50% | 0.45% |
| Dutch | 638 | 1.05%, see rank | 1.08% | 1.51% |
| English | 5,018 | 8.23%, see rank | 6.39% | 8.53% |
| French | 1,680 | 2.75%, see rank | 2.28% | 3.54% |
| German | 7,512 | 12.32%, see rank | 9.10% | 15.79% |
| Greek | 491 | 0.81%, see rank | 0.35% | 0.42% |
| Hungarian | 163 | 0.27%, see rank | 0.34% | 0.48% |
| Irish | 6,064 | 9.94%, see rank | 7.13% | 11.36% |
| Italian | 3,327 | 5.46%, see rank | 4.08% | 5.66% |
| Norwegian | 989 | 1.62%, see rank | 1.06% | 1.46% |
| Polish | 977 | 1.60%, see rank | 1.35% | 3.13% |
| Portuguese | 2,415 | 3.96%, see rank | 0.96% | 0.46% |
| Russian | 511 | 0.84%, see rank | 1.18% | 0.97% |
| Scotch-Irish | 583 | 0.96%, see rank | 0.67% | 1.07% |
| Scottish | 1,379 | 2.26%, see rank | 1.43% | 1.81% |
| Subsaharan African | 559 | 0.92%, see rank | 0.72% | 0.93% |
| Swedish | 702 | 1.15%, see rank | 1.16% | 1.34% |
| Swiss | 369 | 0.61%, see rank | 0.28% | 0.31% |
| Ukrainian | 103 | 0.17%, see rank | 0.26% | 0.31% |
| American | 1,457 | 2.39%, see rank | 2.78% | 6.72% |
| Welsh | 346 | 0.57%, see rank | 0.46% | 0.60% |
ACS 2006-2010 data
57,543 (94.92%) out of the total population of 60,625 reported first ancestry.
| Castro Valley, CA | % of the Total Population | California | U.S. | |
| Arab | 519 | 0.86%, see rank | 0.66% | 0.50% |
| Czech | 276 | 0.46%, see rank | 0.26% | 0.53% |
| Danish | 720 | 1.19%, see rank | 0.53% | 0.48% |
| Dutch | 946 | 1.56%, see rank | 1.15% | 1.63% |
| English | 5,839 | 9.63%, see rank | 6.77% | 9.02% |
| French | 1,973 | 3.25%, see rank | 2.44% | 3.77% |
| German | 7,288 | 12.02%, see rank | 9.60% | 16.51% |
| Greek | 409 | 0.67%, see rank | 0.38% | 0.44% |
| Hungarian | 334 | 0.55%, see rank | 0.36% | 0.51% |
| Irish | 6,837 | 11.28%, see rank | 7.50% | 11.76% |
| Italian | 4,119 | 6.79%, see rank | 4.21% | 5.78% |
| Norwegian | 1,178 | 1.94%, see rank | 1.10% | 1.51% |
| Polish | 719 | 1.19%, see rank | 1.41% | 3.24% |
| Portuguese | 2,665 | 4.40%, see rank | 1.02% | 0.47% |
| Russian | 777 | 1.28%, see rank | 1.22% | 1.01% |
| Scotch-Irish | 1,119 | 1.85%, see rank | 1.19% | 1.72% |
| Scottish | 1,147 | 1.89%, see rank | 1.54% | 1.92% |
| Subsaharan African | 638 | 1.05%, see rank | 0.72% | 0.91% |
| Swedish | 738 | 1.22%, see rank | 1.25% | 1.41% |
| Swiss | 280 | 0.46%, see rank | 0.31% | 0.33% |
| Ukrainian | 177 | 0.29%, see rank | 0.26% | 0.31% |
| American | 1,191 | 1.96%, see rank | 2.43% | 6.28% |
| Welsh | 351 | 0.58%, see rank | 0.49% | 0.63% |
ACS 2005-2009 data
53,045 (95.51%) out of the total population of 55,537 reported first ancestry.
| Castro Valley, CA | % of the Total Population | California | U.S. | |
| Arab | 591 | 1.06%, see rank | 0.66% | 0.50% |
| Czech | 239 | 0.43%, see rank | 0.27% | 0.54% |
| Danish | 693 | 1.25%, see rank | 0.55% | 0.49% |
| Dutch | 917 | 1.65%, see rank | 1.19% | 1.68% |
| English | 6,208 | 11.18%, see rank | 7.02% | 9.29% |
| French | 1,974 | 3.55%, see rank | 2.56% | 3.90% |
| German | 7,905 | 14.23%, see rank | 9.93% | 16.89% |
| Greek | 464 | 0.84%, see rank | 0.38% | 0.45% |
| Hungarian | 315 | 0.57%, see rank | 0.37% | 0.52% |
| Irish | 7,063 | 12.72%, see rank | 7.79% | 12.01% |
| Italian | 4,204 | 7.57%, see rank | 4.33% | 5.91% |
| Norwegian | 1,050 | 1.89%, see rank | 1.14% | 1.55% |
| Polish | 751 | 1.35%, see rank | 1.45% | 3.32% |
| Portuguese | 2,897 | 5.22%, see rank | 1.05% | 0.48% |
| Russian | 816 | 1.47%, see rank | 1.25% | 1.04% |
| Scotch-Irish | 1,102 | 1.98%, see rank | 1.23% | 1.77% |
| Scottish | 1,472 | 2.65%, see rank | 1.61% | 1.97% |
| Subsaharan African | 614 | 1.11%, see rank | 0.71% | 0.88% |
| Swedish | 920 | 1.66%, see rank | 1.28% | 1.45% |
| Swiss | 200 | 0.36%, see rank | 0.32% | 0.34% |
| Ukrainian | 170 | 0.31%, see rank | 0.27% | 0.32% |
| American | 863 | 1.55%, see rank | 2.66% | 6.43% |
| Welsh | 351 | 0.63%, see rank | 0.52% | 0.65% |
US Census 2000 data
49,065 (85.64%) out of the total population of 57,292 reported first ancestry.
| Castro Valley, CA | % of the Total Population | California | U.S. | |
| Arab | 280 | 0.49%, see rank | 0.50% | 0.36% |
| Czech | 62 | 0.11%, see rank | 0.14% | 0.27% |
| Danish | 454 | 0.79%, see rank | 0.38% | 0.30% |
| Dutch | 395 | 0.69%, see rank | 0.71% | 0.91% |
| English | 3,848 | 6.72%, see rank | 4.91% | 5.91% |
| French | 945 | 1.65%, see rank | 1.57% | 2.39% |
| German | 4,504 | 7.86%, see rank | 6.45% | 10.81% |
| Greek | 362 | 0.63%, see rank | 0.29% | 0.34% |
| Hungarian | 78 | 0.14%, see rank | 0.27% | 0.32% |
| Irish | 3,405 | 5.94%, see rank | 4.72% | 6.85% |
| Italian | 4,012 | 7.00%, see rank | 3.41% | 4.59% |
| Norwegian | 850 | 1.48%, see rank | 0.92% | 1.15% |
| Polish | 563 | 0.98%, see rank | 0.95% | 2.24% |
| Portuguese | 2,637 | 4.60%, see rank | 0.75% | 0.33% |
| Russian | 719 | 1.25%, see rank | 0.90% | 0.68% |
| Scotch-Irish | 554 | 0.97%, see rank | 0.87% | 1.17% |
| Scottish | 852 | 1.49%, see rank | 1.00% | 1.12% |
| Subsaharan African | 222 | 0.39%, see rank | 0.51% | 0.61% |
| Swedish | 689 | 1.20%, see rank | 0.86% | 0.87% |
| Swiss | 147 | 0.26%, see rank | 0.21% | 0.19% |
| Ukrainian | 220 | 0.38%, see rank | 0.20% | 0.24% |
| American | 1,613 | 2.82%, see rank | 3.37% | 7.33% |
| Welsh | 171 | 0.30%, 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.