UK
- Lancaster, by i Lancashire
- City of Lancaster, distrikt Lancashire
Amerikas Forenede Stater
- Lancaster, by i Los Angeles County, Californien
- Lancaster, amtssædet i Lancaster County, South Carolina
- Lancaster, by i Atchison County, Kansas
- Lancaster, amtssæde i Garrard County, Kentucky
- Lancaster, Worcester County Kommune, Massachusetts
- Lancaster, en by i Kittson County, Minnesota
- Lancasteramtssædet i Schuyler County, Missouri
- Lancaster, gamle navn på byen Lincoln, Nebraska
- Lancaster, hovedstad kommune i Coos County, New Hampshire
- Lancaster, by i Erie County, New York
- Lancaster, amtssædet for Fairfield County, Ohio
- Lancaster, Township i Butler County, Pennsylvania
- Lancaster, amtssædet for Lancaster County, Pennsylvania
- Lancaster, et township i Lancaster County, Pennsylvania
- Lancaster, by i Dallas County, Texas
- Lancaster, amtssædet i Lancaster County, Virginia
- Lancaster, amtssæde i Grant County, Wisconsin