Polk County Population

1860–2026

45,834

2026 projection

1.8% 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.
202645,834+310.07%
202545,803+310.07%
202445,772-30.01%
202345,775+1850.41%
202245,590+1310.29%
202145,459+4310.96%
202045,028+1,3233.03%
201943,705+1270.29%
201843,578+1690.39%
201743,409+1480.34%

Showing 10 of 31 years.

Polk County Demographics

46.7median age

Median age

Female47.1 yrs
Male46.3 yrs

Adults

36,497
10,305 seniors (65+) · 28% of adults26,192 other adults

Sex

Female 49.1% · 22,372Male 50.9% · 23,183

Population by age

MaleFemale85+ years, male: 34185+ years, female: 47380–84 years, male: 64280–84 years, female: 68175–79 years, male: 87675–79 years, female: 95070–74 years, male: 1,62570–74 years, female: 1,40465–69 years, male: 1,62865–69 years, female: 1,68560–64 years, male: 2,07860–64 years, female: 1,92455–59 years, male: 1,80555–59 years, female: 1,84850–54 years, male: 1,52250–54 years, female: 1,45145–49 years, male: 1,36345–49 years, female: 1,28940–44 years, male: 1,25540–44 years, female: 1,34135–39 years, male: 1,46035–39 years, female: 1,28930–34 years, male: 1,16830–34 years, female: 1,25525–29 years, male: 1,14825–29 years, female: 1,05920–24 years, male: 1,09320–24 years, female: 97115–19 years, male: 1,44915–19 years, female: 1,29410–14 years, male: 1,51410–14 years, female: 1,2425–9 years, male: 1,1445–9 years, female: 1,2270–4 years, male: 1,0720–4 years, female: 98985+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–41K1K

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 456 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

$77,219median household income

Median household income

$77,219

Half of households earn more, half earn less

Median earnings

$50,908

Typical yearly pay for a worker 25 or older.

Poverty rate

8.2%

About 1 in 12 residents

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

Polk County Marital Status

57% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married57%56%58%
Never married25%29%20%
Divorced13%12%13%
Widowed6%3%8%
Separated<1%<1%<1%

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