Lancaster
Current Population
4,031
Estimated July 1, 2025
Annual change-0.3%2024–2025
Latest Official Census
3,907
2020 Census
Population Over Time
Estimated population changed from 3,934 in 2020 to 4,031 in 2025.
| Year | Population | Change | % change |
|---|---|---|---|
| 2020 | 3,934 | — | — |
| 2021 | 3,947 | +13 | +0.3% |
| 2022 | 3,941 | -6 | -0.2% |
| 2023 | 4,027 | +86 | +2.2% |
| 2024 | 4,042 | +15 | +0.4% |
| 2025 | 4,031 | -11 | -0.3% |
2020 Census (official count): 3,907
Insights
Lancaster's population changed 1% 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 59.25, confidence 75); chosen from 1 eligible candidate(s).
Compared against: U.S. places
Confidence: 75/100
Lancaster is Wisconsin's 170th-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 65.25, 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 — 4,031 · July 1, 2025
U.S. Census Bureau — Subcounty Resident Population Estimates (SUB-EST2025), Vintage 2025
Official Census — 3,907 · 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
- 5542250
- Legal status
- incorporated
- LSAD description
- city
- Primary county
- Grant County