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Boulder County Historical Place of Birth and Citizenship Data
ACS 2010-2014 data
Total population: 305,166
| Boulder County | % | Colorado | U.S. | |
| Native | 272,733 | 89.37%, see rank | 90.24% | 86.93% |
| Born in the State of Residence | 99,905 | 32.74%, see rank | 42.58% | 58.73% |
| Born in Different State | 168,289 | 55.15%, see rank | 46.22% | 26.78% |
| Born in Puerto Rico, U.S. Island Areas, or Born Abroad to American Parent(s) | 4,539 | 1.49%, see rank | 1.45% | 1.42% |
| Foreign Born | 32,433 | 10.63%, see rank | 9.76% | 13.07% |
| Foreign Born with U.S. Citizenship | 12,961 | 4.25%, see rank | 3.70% | 5.99% |
| Foreign Born without U.S. Citizenship | 19,472 | 6.38%, see rank | 6.06% | 7.09% |
| Born In Europe | 6,967 | 2.28%, see rank | 1.37% | 1.53% |
| Born In Asia | 9,777 | 3.20%, see rank | 2.17% | 3.82% |
| Born In Africa | 639 | 0.21%, see rank | 0.55% | 0.55% |
| Born In Oceania | 360 | 0.12%, see rank | 0.08% | 0.07% |
| Born In Latin America | 13,483 | 4.42%, see rank | 5.30% | 6.83% |
| Born In Northern America | 1,207 | 0.40%, see rank | 0.30% | 0.26% |
ACS 2008-2012 data
Total population: 297,218
| Boulder County | % | Colorado | U.S. | |
| Native | 264,892 | 89.12%, see rank | 90.28% | 87.13% |
| Born in the State of Residence | 95,072 | 31.99%, see rank | 42.23% | 58.71% |
| Born in Different State | 165,850 | 55.80%, see rank | 46.65% | 27.04% |
| Born in Puerto Rico, U.S. Island Areas, or Born Abroad to American Parent(s) | 3,970 | 1.34%, see rank | 1.40% | 1.38% |
| Foreign Born | 32,326 | 10.88%, see rank | 9.72% | 12.87% |
| Foreign Born with U.S. Citizenship | 11,659 | 3.92%, see rank | 3.47% | 5.71% |
| Foreign Born without U.S. Citizenship | 20,667 | 6.95%, see rank | 6.25% | 7.16% |
| Born In Europe | 6,827 | 2.30%, see rank | 1.37% | 1.56% |
| Born In Asia | 9,295 | 3.13%, see rank | 2.10% | 3.67% |
| Born In Africa | 560 | 0.19%, see rank | 0.48% | 0.51% |
| Born In Oceania | 285 | 0.10%, see rank | 0.08% | 0.07% |
| Born In Latin America | 14,058 | 4.73%, see rank | 5.40% | 6.79% |
| Born In Northern America | 1,301 | 0.44%, see rank | 0.27% | 0.26% |
ACS 2006-2010 data
Total population: 290,177
| Boulder County | % | Colorado | U.S. | |
| Native | 257,764 | 88.83%, see rank | 90.18% | 87.28% |
| Born in the State of Residence | 92,473 | 31.87%, see rank | 42.20% | 58.66% |
| Born in Different State | 161,754 | 55.74%, see rank | 46.64% | 27.28% |
| Born in Puerto Rico, U.S. Island Areas, or Born Abroad to American Parent(s) | 3,537 | 1.22%, see rank | 1.34% | 1.33% |
| Foreign Born | 32,413 | 11.17%, see rank | 9.82% | 12.72% |
| Foreign Born with U.S. Citizenship | 10,735 | 3.70%, see rank | 3.25% | 5.48% |
| Foreign Born without U.S. Citizenship | 21,678 | 7.47%, see rank | 6.57% | 7.24% |
| Born In Europe | 7,056 | 2.43%, see rank | 1.40% | 1.59% |
| Born In Asia | 9,053 | 3.12%, see rank | 2.06% | 3.54% |
| Born In Africa | 439 | 0.15%, see rank | 0.40% | 0.48% |
| Born In Oceania | 381 | 0.13%, see rank | 0.08% | 0.07% |
| Born In Latin America | 14,231 | 4.90%, see rank | 5.58% | 6.77% |
| Born In Northern America | 1,253 | 0.43%, see rank | 0.29% | 0.27% |
ACS 2005-2009 data
Total population: 295,524
| Boulder County | % | Colorado | U.S. | |
| Native | 263,182 | 89.06%, see rank | 90.16% | 87.61% |
| Born in the State of Residence | 96,189 | 32.55%, see rank | 42.19% | 58.98% |
| Born in Different State | 163,325 | 55.27%, see rank | 46.65% | 27.35% |
| Born in Puerto Rico, U.S. Island Areas, or Born Abroad to American Parent(s) | 3,668 | 1.24%, see rank | 1.32% | 1.29% |
| Foreign Born | 32,342 | 10.94%, see rank | 9.84% | 12.39% |
| Foreign Born with U.S. Citizenship | 10,128 | 3.43%, see rank | 3.13% | 5.28% |
| Foreign Born without U.S. Citizenship | 22,214 | 7.52%, see rank | 6.71% | 7.11% |
| Born In Europe | 6,935 | 2.35%, see rank | 1.43% | 1.64% |
| Born In Asia | 7,992 | 2.70%, see rank | 1.95% | 3.34% |
| Born In Africa | 430 | 0.15%, see rank | 0.38% | 0.46% |
| Born In Oceania | 276 | 0.09%, see rank | 0.08% | 0.07% |
| Born In Latin America | 15,435 | 5.22%, see rank | 5.71% | 6.60% |
| Born In Northern America | 1,274 | 0.43%, see rank | 0.28% | 0.28% |
US Census 2000 data
Total population: 291,288
| Boulder County | % | Colorado | U.S. | |
| Native | 264,009 | 90.64%, see rank | 91.40% | 88.95% |
| Born in the State of Residence | 89,610 | 30.76%, see rank | 41.07% | 59.96% |
| Born in Different State | 170,778 | 58.63%, see rank | 49.04% | 27.74% |
| Born in Puerto Rico, U.S. Island Areas, or Born Abroad to American Parent(s) | 3,621 | 1.24%, see rank | 1.29% | 1.25% |
| Foreign Born | 27,279 | 9.36%, see rank | 8.60% | 11.05% |
| Foreign Born with U.S. Citizenship | 7,923 | 2.72%, see rank | 2.72% | 4.46% |
| Foreign Born without U.S. Citizenship | 19,356 | 6.64%, see rank | 5.88% | 6.60% |
| Born In Europe | 6,036 | 2.07%, see rank | 1.52% | 1.75% |
| Born In Asia | 7,242 | 2.49%, see rank | 1.68% | 2.92% |
| Born In Africa | 690 | 0.24%, see rank | 0.23% | 0.31% |
| Born In Oceania | 285 | 0.10%, see rank | 0.07% | 0.06% |
| Born In Latin America | 11,696 | 4.02%, see rank | 4.78% | 5.72% |
| Born In Northern America | 1,330 | 0.46%, see rank | 0.32% | 0.29% |
* 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.