Fitchburg
Current Population
34,615
Estimated July 1, 2025
Annual change+1.2%2024–2025
Latest Official Census
29,609
2020 Census
Population Over Time
Estimated population changed from 31,298 in 2020 to 34,615 in 2025.
| Year | Population | Change | % change |
|---|---|---|---|
| 2020 | 31,298 | — | — |
| 2021 | 31,651 | +353 | +1.1% |
| 2022 | 32,311 | +660 | +2.1% |
| 2023 | 33,404 | +1,093 | +3.4% |
| 2024 | 34,207 | +803 | +2.4% |
| 2025 | 34,615 | +408 | +1.2% |
2020 Census (official count): 29,609
Insights
Fitchburg's population grew 17.2% from 2010 to 2020.
Source: U.S. Census Bureau — 2020 Census Redistricting Data (P.L. 94-171), table P1
How this was determined
Strongest eligible observation in category "change" (score 68.91, confidence 75); chosen from 1 eligible candidate(s).
Compared against: U.S. places
Confidence: 75/100
Fitchburg is Wisconsin's 26th-largest incorporated place by population.
Source: U.S. Census Bureau — Subcounty Resident Population Estimates (SUB-EST2025), Vintage 2025
How this was determined
Strongest eligible observation in category "perspective" (score 67.65, confidence 85); chosen from 1 eligible candidate(s).
Compared against: incorporated places in Wisconsin
Confidence: 85/100
Sources & Methodology
The current population figure is an annual estimate from the U.S. Census Bureau's Population Estimates Program. The 2020 Census is shown separately as the official benchmark.
Current estimate — 34,615 · July 1, 2025
U.S. Census Bureau — Subcounty Resident Population Estimates (SUB-EST2025), Vintage 2025
Official Census — 29,609 · April 1, 2020
U.S. Census Bureau — 2020 Census Redistricting Data (P.L. 94-171), table P1
These figures can differ because the Census and annual population estimates are produced at different times using different methods. Both are shown so you can distinguish the most current estimate from the official Census benchmark.
- FIPS code
- 5525950
- Legal status
- incorporated
- LSAD description
- city
- Primary county
- Dane County