Canada
UK
- Dorchester (Dorset), i Dorset
- Dorchester (Oxfordshire), iOxfordshire, også kaldet Dorchester-on-Thames
Amerikas Forenede Stater
- Dorchester (Illinois), iIllinois
- Dorchester (Iowa), iIowa
- Dorchester (Massachusetts), i Massachusetts
- Dorchester (Nebraska), i Nebraska
- Dorchester (New Hampshire), i New Hampshire
- Dorchester (Texas), i Texas
- Dorchester (Wisconsin), i Wisconsin
- Dorchester County, i Maryland
- Dorchester County, i South Carolina