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The total population of Polk County is estimated to be 493,378 with 245,241 males (49.71%) and 248,137 females (50.29%). There are 2,896 more females than males in Polk County.
The median household income in Polk County was $78,923 in 2021, which marked an a decrease of 110(0.14%) from $79,033 in 2020. This income is 105.79% of the U.S. median household income of $74,606 (all incomes in 2022 inflation-adjusted dollars).
Per the latest American Community Survey by the Census Bureau, Polk County sees its highest median household income among householders in the age group of 45 to 64 years old, at $96,919. Overall, the median household income for the county of Polk County stands at $77,038.
In Polk County, the median income for all workers aged 15 years and older, regardless of work hours, was $51,327 for males and $36,861 for females. However, when specifically considering full-time, year-round workers within the same age group, the median income was $67,756 for males and $54,705 for females.
In Polk County, the demographic landscape is diverse, spanning 5 distinct racial categories among households. Among these, Asian households have the highest median household income at $103,911, while Black or African American households represent the opposite end with the lowest median household income of $39,339.
In 2022, the population of Polk County was 501,089, a 0.69% increase year-by-year from 2021. Previously, in 2021, Polk County's population was 497,675, an increase of 0.95% compared to a population of 492,997 in 2020.
The median age in Polk County, IA is 35.9, as per 2021 ACS 5-Year Estimates. Of the total population, 20.85% were under the age of 15, 20.39% aged 15 to 29, 45.71% aged 30 to 64, 11.52% aged 65 to 84, and 1.52% were 85 years of age and older.
Racial distribution of Polk County population: 81.35% are White, 7.18% are Black or African American, 0.23% are American Indian and Alaska Native, 4.94% are Asian, 0.08% are Native Hawaiian and other Pacific Islander, 1.88% are some other race and 4.34% are multiracial.