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Polk 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 405,382 100.00% 483,924 100.00%
Total Native Population 390,976 96.45% 450,405 93.07%
Born in US 386,676 95.39% 441,430 91.22%
Born in Same State 169,398 41.79% 209,544 43.30%
Born in Different State 217,278 53.60% 231,886 47.92%
Born Outside US 4,300 1.06% 8,975 1.85%
Total Foreign Born Population 14,406 3.55% 33,519 6.93%
Naturalized 7,475 1.84% 11,908 2.46%
Non-Naturalized 6,931 1.71% 21,611 4.47%

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

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