Lancaster, Ohio population
Incorporated place · Official geographic code 3941720 · Census name: Lancaster city
· Annual resident population estimate
U.S. Census Bureau · Population Estimates Program · Vintage 2025
+203 residents (+0.49%) since July 1, 2024.
- Population change, 2020–2025
- +1,317July 1 to July 1 · +3.24%
- Land-area density, 2025
- 2,192.2People per square mile · 2025 land area
- Population rank, 2025
- 982 of 19,471Active whole incorporated places; balances excluded
Lancaster population history
Open historical explorerThese six July 1 estimates belong to one consistent Vintage 2025 series. The Census Bureau revises earlier years when it releases a new vintage; a figure from an older publication may differ from the value below.
Annual estimates · 2020–2025 · Vertical scale shown on chart.
The highest observed population in this annual series was 41,956 in 2025. This is a peak within 2020–2025 coverage, not an all-time record.
| Reference date | Population | Annual change |
|---|---|---|
| July 1, 2020 | 40,639 | — |
| July 1, 2021 | 40,835 | +196 |
| July 1, 2022 | 41,271 | +436 |
| July 1, 2023 | 41,502 | +231 |
| July 1, 2024 | 41,753 | +251 |
| July 1, 2025 | 41,956 | +203 |
Why is the April 2020 estimates base different from a census count?
The PEP estimates base here is 40,543 residents on April 1, 2020. It incorporates the Census Bureau’s corrections and geographic revisions and serves as the starting point for this annual series. It is not labeled an original 2020 census count. The chart starts at July 1, 2020, so its five-year change uses two July observations. Read about measurement types.
Growth and density
Between July 1, 2020 and July 1, 2025, Lancaster gained 1,317 residents, a 3.24% increase. The annualized change over these five elapsed years was +0.64%. Annualized change is a summary of the interval; it does not imply that the population changed at that rate in every year.
The 2025 Gazetteer reports 19.14 square miles of land. Dividing the July 1, 2025 population by that compatible land area gives 2,192.2 people per square mile. Water area is excluded. Density depends on geographic boundaries. It describes this entire place, rather than a typical neighborhood or built-up area.
Calculations use unrounded source values. Population counts are displayed as integers, percentages to two decimals and density to one decimal. Calculation methods · Growth calculator
Population characteristics and migration
This incorporated-place totals file does not provide city-level births, deaths, migration components or age distributions. Those statistics are not estimated from a county’s values here. County profiles provide supported change components, while age characteristics require a separately labeled PEP or ACS product. See characteristics coverage.
Geographic context
This is the whole incorporated-place record, not a metropolitan-area population. A place can span more than one county; the county links below come from published county/place-part relationships. County totals are context and are not substitutes for a city observation.
| Place | Population · 2025 | Change · 2024–25 | Growth · 2024–25 | People / sq. mi. |
|---|---|---|---|---|
| Fairfield CountyOhio · County equivalent · 39045 | 169,752 | +2,046 | +1.22% | 336.6 |
Showing 1 of 1 related records.
Ohio population · State city directory · City proper versus county versus metro
Places with nearby population ranks
Selected from the same 2025 comparison universe, using neighboring population ranks. Similar population does not imply similar density, boundaries or demographics.
| Place | Population · 2025 | Change · 2024–25 | Growth · 2024–25 | People / sq. mi. |
|---|---|---|---|---|
| Lake StevensWashington · Incorporated place · 5337900 | 42,091 | +881 | +2.14% | 4,142.4 |
| San LuisArizona · Incorporated place · 0463470 | 42,030 | +1,827 | +4.54% | 1,242.7 |
| Cedar CityUtah · Incorporated place · 4911320 | 41,871 | +861 | +2.10% | 1,154.3 |
| CovingtonKentucky · Incorporated place · 2117848 | 41,847 | +202 | +0.49% | 3,178.6 |
Source, citation and downloads
U.S. Census Bureau, Population Estimates Program, Vintage 2025, sub-est2025.csv, variable POPESTIMATE2025; Lancaster city, Ohio, geographic code 3941720; resident population 41,956 on July 1, 2025; boundaries January 1, 2025. https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/cities/totals/sub-est2025.csv. Retrieved September 30, 2026. US Population Data snapshot pep-2025-r1, transformation 1.
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