Population
40,526
LancasterCensus, July 2025
From 41,253 in July 2020 to 40,526 in July 2025.
The Census Bureau's estimate of everyone living here on July 1.
Lancaster by the numbers
Official figures for Lancaster. Each one shows its date, its source and the area it covers. A figure for a larger area says so.
People
Change in a year
-0.8%
LancasterCensus, 2024 to 2025
Change in the population estimate over one year, from July 1 to July 1, both from the same release.
Change over 5 years
-1.8%
LancasterCensus, 2020 to 2025
Change in the population estimate over five years, from July 1 to July 1, both from the same release.
Sources
- U.S. Census Bureau, Population Estimates, Vintage 2025 · Public domain
Figures are shown as each source publishes them. Survey figures carry a 90% margin of error. A figure for a larger area is labelled with that area.