Polk County Population

1870–2026

898.15K

2026 projection

23% since 2020 (increase)

0200K400K600K800K1M18801900192019401960198020002020

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.
2026898,146+23,3562.67%
2025874,790+23,3562.74%
2024851,434+26,6403.23%
2023824,794+33,9984.30%
2022790,796+34,9934.63%
2021755,803+25,6553.51%
2020730,148+5,1810.71%
2019724,967+17,8722.53%
2018707,095+21,3053.11%
2017685,790+19,5192.93%

Showing 10 of 30 years.

Polk County Demographics

39.5median age

Median age

Female40.5 yrs
Male38.4 yrs

Adults

616,747
154,193 seniors (65+) · 25% of adults462,554 other adults

Sex

Female 50.7% · 400,821Male 49.3% · 389,873

Population by age

MaleFemale85+ years, male: 6,87885+ years, female: 10,04980–84 years, male: 8,82780–84 years, female: 10,38975–79 years, male: 15,44175–79 years, female: 16,96670–74 years, male: 18,09570–74 years, female: 22,31365–69 years, male: 21,59665–69 years, female: 23,63960–64 years, male: 22,94160–64 years, female: 24,00955–59 years, male: 22,24955–59 years, female: 24,06450–54 years, male: 23,28850–54 years, female: 23,26845–49 years, male: 22,89645–49 years, female: 23,42840–44 years, male: 24,87940–44 years, female: 24,90835–39 years, male: 26,35535–39 years, female: 26,11530–34 years, male: 27,82030–34 years, female: 27,60425–29 years, male: 25,09125–29 years, female: 25,25820–24 years, male: 24,18720–24 years, female: 24,28115–19 years, male: 26,06715–19 years, female: 24,87310–14 years, male: 26,98910–14 years, female: 24,3765–9 years, male: 23,5745–9 years, female: 23,6020–4 years, male: 22,7000–4 years, female: 21,67985+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–410K10K20K20K

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 7,907 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

$65,978median household income

Median household income

$65,978

Half of households earn more, half earn less

Median earnings

$43,179

Typical yearly pay for a worker 25 or older.

Poverty rate

14.5%

About 1 in 7 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%50%45%
Never married32%34%30%
Divorced12%11%14%
Widowed7%4%10%
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