Census Trend Charts Demographic Maps Rankings & Comparisons Segregation Data  

Zoom in and out of geography at levels: US, States or Metro Areas, and Counties within States.

You can zoom out to Iowa

Visit the SSDAN Web Site
CensusScope is a product of the Social Science Data Analysis Network.

Polk County

Print-Friendly Version


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 327,140 100.00% 374,601 100.00%
Total Native Population 319,269 97.59% 352,439 94.08%
Born in US 317,515 97.06% 350,659 93.61%
Born in Same State 242,134 74.02% 266,730 71.20%
Born in Different State 75,381 23.04% 83,929 22.40%
Born Outside US 1,754 0.54% 1,780 0.48%
Total Foreign Born Population 7,871 2.41% 22,162 5.92%
Naturalized 3,957 1.21% 7,072 1.89%
Non-Naturalized 3,914 1.20% 15,090 4.03%

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

Home | About | Help | Contact | Use Policy