Fitchburg Population

1990–2026

35,342

2026 projection

19.4% since 2020 (increase)

010K20K30K40K19901995200020052010201520202025

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 Fitchburg. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202635,342+7272.10%
202534,615+4081.19%
202434,207+8032.40%
202333,404+1,0933.38%
202232,311+6602.09%
202131,651+2,0426.90%
202029,609-670.23%
201929,676+5551.91%
201829,121+4781.67%
201728,643+5802.07%

Showing 10 of 19 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

Fitchburg is growing faster than Dane County, Wisconsin, and the U.S.

  • Fitchburg+10.6%
  • Dane County+4.9%
  • United States+3.1%
  • Wisconsin+1.3%

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.

Fitchburg Demographics

34.4median age

Median age

Female34.8 yrs
Male33.4 yrs

Adults

27,206
4,966 seniors (65+) · 18% of adults22,240 other adults

Sex

Female 45.9% · 14,968Male 54.1% · 17,651

Population by age

MaleFemale85+ years, male: 16185+ years, female: 22980–84 years, male: 29680–84 years, female: 32075–79 years, male: 35375–79 years, female: 46770–74 years, male: 59070–74 years, female: 74165–69 years, male: 1,35165–69 years, female: 45860–64 years, male: 67560–64 years, female: 95555–59 years, male: 91855–59 years, female: 83750–54 years, male: 79250–54 years, female: 80045–49 years, male: 73245–49 years, female: 67640–44 years, male: 1,13640–44 years, female: 79835–39 years, male: 1,32535–39 years, female: 1,10530–34 years, male: 1,47230–34 years, female: 2,10025–29 years, male: 2,45925–29 years, female: 1,74320–24 years, male: 2,36420–24 years, female: 1,05315–19 years, male: 46215–19 years, female: 37510–14 years, male: 94010–14 years, female: 6595–9 years, male: 8235–9 years, female: 7390–4 years, male: 8020–4 years, female: 91385+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–41K1K2K2K

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 326 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

Fitchburg Income

$86,516median household income

Median household income

$86,516

Half of households earn more, half earn less

Median earnings

$60,134

Typical yearly pay for a worker 25 or older.

Poverty rate

9.3%

About 1 in 11 residents

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

Fitchburg Marital Status

44% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married44%43%46%
Never married43%48%36%
Divorced10%8%12%
Widowed3%1%5%
Separated<1%<1%<1%

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

Sources

14 sources

Population

American Community Survey, 2024 5-year

Additional sources