Polk County Population

1860–2026

46,225

2026 projection

7.7% since 2020 (increase)

010K20K30K40K50K186018801900192019401960198020002020

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Polk County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202646,225+7111.56%
202545,514+7111.59%
202444,803+4050.91%
202344,398+6561.50%
202243,742+3830.88%
202143,359+4301.00%
202042,929+3130.73%
201942,616+2430.57%
201842,373+5311.27%
201741,842+2580.62%

Showing 10 of 31 years.

Polk County Demographics

38median age

Median age

Female38.8 yrs
Male37.2 yrs

Adults

32,794
6,736 seniors (65+) · 21% of adults26,058 other adults

Sex

Female 51.1% · 22,389Male 48.9% · 21,396

Population by age

MaleFemale85+ years, male: 23185+ years, female: 34780–84 years, male: 31580–84 years, female: 41275–79 years, male: 62175–79 years, female: 72670–74 years, male: 64870–74 years, female: 95965–69 years, male: 1,17065–69 years, female: 1,30760–64 years, male: 1,69760–64 years, female: 1,37355–59 years, male: 1,10555–59 years, female: 1,38150–54 years, male: 1,26050–54 years, female: 1,43345–49 years, male: 1,23345–49 years, female: 1,35340–44 years, male: 1,63740–44 years, female: 1,51735–39 years, male: 1,46935–39 years, female: 1,34530–34 years, male: 1,20730–34 years, female: 1,34425–29 years, male: 1,63025–29 years, female: 1,57520–24 years, male: 1,34720–24 years, female: 1,18815–19 years, male: 1,54815–19 years, female: 1,59610–14 years, male: 1,89410–14 years, female: 1,4435–9 years, male: 1,1165–9 years, female: 1,5030–4 years, male: 1,2680–4 years, female: 1,58785+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45005001K1K1.5K1.5K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 438 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Polk County Income

$58,515median household income

Median household income

$58,515

Half of households earn more, half earn less

Median earnings

$41,477

Typical yearly pay for a worker 25 or older.

Poverty rate

16.4%

About 1 in 6 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Polk County Marital Status

48% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married48%51%46%
Never married30%32%28%
Divorced13%12%14%
Widowed6%2%9%
Separated2%2%2%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

8 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year