Demographic Profile for Polk County, Iowa
Polk County, Iowa had a total estimated population of 401,006 in 2005. The estimated population has increased sharply, since the population in 2000 of 375,804. This growth shows an increase of 6.7 percent. Polk ranks 1 of 99 counties by growth in total population in Iowa and the county ranks 130 of 3,141 counties by growth in county population in the United States.
Polk County, Iowa has a population that is made up of 84.9 percent White, 4.8 percent African American, 3 percent Asian, and 5.7 percent Hispanic. The area can be described as having a modest amount of racial and ethnic diversity, with 13.5 percent of the population made up of minorities. This is greater than the State of Iowa percent of 7.3. Since 2000, Polk has increased the level of diversity when 12.0 percent of the population was made up of minorities.
When calculating the total land area, Polk encompasses a total area of 569 square miles. The county has a high density of 704 persons per square mile. Other counties with similar densities in the US include: -- more densely populated -- El Paso, TX (712 per sq. mile ), Schenectady, NY (723 per sq. mile ), Lafayette, LA (732 per sq. mile ), -- less densely populated -- San Diego, CA (698 per sq. mile ), Kent, MI (697 per sq. mile ), Galveston, TX (697 per sq. mile ).
The population division of the Census Bureau estimates in 2005 a median age in Polk County, Iowa to be 35.9 years of age. The median age in Polk is less than the median age in the State of Iowa of 38.6. Since the year 2000, the area has witnessed an increase in the median age, at that time the median was 34.4 years old. With a total of 24.7 percent of the 2005 population being comprised of individuals under the age of 18, Polk can be described as being made up of a medium-high percent of individuals under 18. The working age population group (18-64) has a medium-high presence of the 2005 population base, with 64.4 percent of the population falling in this age category. The retirement (65 and over) group makes up 11 percent of the population. When compared to other counties in the United States, this represents a medium-low proportion of the population.
Estimated since the year 2000, a high number of individual migrated to the Polk from another country. The international migration into Polk totals 26.1 percent of immigration into the State of Iowa. This level of international migration can be considered high when comparing levels of immigration per population in 2005.
Datasource: Population Estimates Program, U.S. Bureau of the Census.
Polk County, Iowa has a population that is made up of 84.9 percent White, 4.8 percent African American, 3 percent Asian, and 5.7 percent Hispanic. The area can be described as having a modest amount of racial and ethnic diversity, with 13.5 percent of the population made up of minorities. This is greater than the State of Iowa percent of 7.3. Since 2000, Polk has increased the level of diversity when 12.0 percent of the population was made up of minorities.
When calculating the total land area, Polk encompasses a total area of 569 square miles. The county has a high density of 704 persons per square mile. Other counties with similar densities in the US include: -- more densely populated -- El Paso, TX (712 per sq. mile ), Schenectady, NY (723 per sq. mile ), Lafayette, LA (732 per sq. mile ), -- less densely populated -- San Diego, CA (698 per sq. mile ), Kent, MI (697 per sq. mile ), Galveston, TX (697 per sq. mile ).
The population division of the Census Bureau estimates in 2005 a median age in Polk County, Iowa to be 35.9 years of age. The median age in Polk is less than the median age in the State of Iowa of 38.6. Since the year 2000, the area has witnessed an increase in the median age, at that time the median was 34.4 years old. With a total of 24.7 percent of the 2005 population being comprised of individuals under the age of 18, Polk can be described as being made up of a medium-high percent of individuals under 18. The working age population group (18-64) has a medium-high presence of the 2005 population base, with 64.4 percent of the population falling in this age category. The retirement (65 and over) group makes up 11 percent of the population. When compared to other counties in the United States, this represents a medium-low proportion of the population.
Estimated since the year 2000, a high number of individual migrated to the Polk from another country. The international migration into Polk totals 26.1 percent of immigration into the State of Iowa. This level of international migration can be considered high when comparing levels of immigration per population in 2005.
Datasource: Population Estimates Program, U.S. Bureau of the Census.
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