Beloit Population

1860–2026

36,636

2026 projection

0.1% since 2020 (decrease)

010K20K30K40K186018801900192019401960198020002020

Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal 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 Beloit. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202636,636-130.04%
202536,649-410.11%
202436,690+1470.40%
202336,543+850.23%
202236,458-200.05%
202136,478-1790.49%
202036,657-2290.62%
201936,886-820.22%
201836,968+1050.28%
201736,863+1600.44%

Showing 10 of 32 years.

The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.

Growth since 2020, compared

Beloit has a population change lower than Rock County, Wisconsin, and the U.S.

  • United States+3.1%
  • Rock County+1.7%
  • Wisconsin+1.3%
  • Beloit−0.2%

Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.

Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.

Beloit Demographics

33.8median age

Median age

Female35.5 yrs
Male31.5 yrs

Adults

27,250
5,117 seniors (65+) · 19% of adults22,133 other adults

Sex

Female 50.3% · 18,390Male 49.7% · 18,144

Population by age

MaleFemale85+ years, male: 17185+ years, female: 31180–84 years, male: 16480–84 years, female: 26775–79 years, male: 35875–79 years, female: 37870–74 years, male: 73170–74 years, female: 83165–69 years, male: 1,01465–69 years, female: 89260–64 years, male: 1,05860–64 years, female: 1,14055–59 years, male: 1,26155–59 years, female: 1,37250–54 years, male: 95150–54 years, female: 1,11745–49 years, male: 79045–49 years, female: 1,04040–44 years, male: 79640–44 years, female: 1,05935–39 years, male: 1,04335–39 years, female: 91930–34 years, male: 1,13330–34 years, female: 1,40625–29 years, male: 1,41425–29 years, female: 1,30920–24 years, male: 1,42220–24 years, female: 1,52115–19 years, male: 1,57615–19 years, female: 1,31210–14 years, male: 1,15210–14 years, female: 1,2985–9 years, male: 1,5955–9 years, female: 1,1990–4 years, male: 1,5150–4 years, female: 1,01985+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45005001K1K

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 365 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

Beloit Income

$62,663median household income

Median household income

$62,663

Half of households earn more, half earn less

Median earnings

$43,868

Typical yearly pay for a worker 25 or older.

Poverty rate

15%

About 1 in 7 residents

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

Beloit Marital Status

36% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married36%37%35%
Never married44%46%41%
Divorced12%12%12%
Widowed5%3%8%
Separated3%2%4%

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

Sources

14 sources

Population

American Community Survey, 2024 5-year

Additional sources