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Contra Costa County

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The Census includes all residents of the United States, regardless of their citizenship status. In some areas of the country, those without American citizenship account for a substantial proportion of the population, while in many areas, particularly in the Midwest, the make up only a small percentage of residents. Likewise, in some areas the majority of the population has come from other states within the U.S. while in others, particularly in the South, the population is more stable over time.

Nativity and Citizenship Status, 1990-2000
1990 2000
Number Percent Number Percent
Total Population 803,732 100.00% 948,816 100.00%
Total Native Population 696,672 86.68% 768,328 80.98%
Born in US 686,617 85.43% 757,959 79.88%
Born in Same State 419,001 52.13% 518,090 54.60%
Born in Different State 267,616 33.30% 239,869 25.28%
Born Outside US 10,055 1.25% 10,369 1.09%
Total Foreign Born Population 107,060 13.32% 180,488 19.02%
Naturalized 47,777 5.94% 82,317 8.68%
Non-Naturalized 59,283 7.38% 98,171 10.35%

Source: Census 2000 analyzed by the Social Science Data Analysis Network (SSDAN).

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