Canada
UK
- Dorchester (Dorset), in Dorset
- Dorchester (Oxfordshire), inOxfordshire, also called Dorchester-on-Thames
United States of America
- Dorchester (Illinois), inIllinois
- Dorchester (Iowa), inIowa
- Dorchester (Massachusetts), in Massachusetts
- Dorchester (Nebraska), in Nebraska
- Dorchester (New Hampshire), in New Hampshire
- Dorchester (Texas), in Texas
- Dorchester (Wisconsin), in Wisconsin
- Dorchester County, in Maryland
- Dorchester County, in South Carolina