en Dorchester

Dorchester may refer to:

Geography

Dorchester, Dorset, the county town of Dorset
- Dorchester (UK Parliament constituency), a former parliamentary constituency in Dorset
- HM Prison Dorchester, a men's prison located in Dorchester in Dorset, England closed in December 2013
Dorchester on Thames, Oxfordshire, a village
The Dorchester, a luxury hotel in London

Dorchester, New Brunswick, shire town of Westmorland County
- Dorchester Penitentiary, a medium-security federal prison in New Brunswick
- Dorchester Parish, New Brunswick
Dorchester, Ontario, a rural community in Middlesex County
Saint-Prosper-de-Dorchester, a municipality in Quebec
- Dorchester (federal electoral district), a former federal electoral district in Quebec
- Dorchester (provincial electoral district), a former Quebec provincial electoral district
- Dorchester Boulevard, former name of part of René Lévesque Boulevard in Montreal, Quebec

USS Dorchester, the name of several United States Navy ships
SS Dorchester, a War Shipping Administration troop transport ship torpedoed February 3, 1943, noted for four Army Chaplains that gave up their life vests to save others
A fictional 'HMS Dorchester featured in the Norman Wisdom film The Bulldog Breed
"Dorchester", a nickname for the AEC armoured command vehicle
Dorchester armour, a variant of Chobham armour used on modern battle tanks

The Duke of Dorchester a.k.a. Pete Doherty (born 1945), professional wrestler
Guy Carleton, 1st Baron Dorchester, a military commander in the Seven Years' War and American Revolutionary War, later Commander-in-Chief, North America, Governor of Quebec, and Governor General of Canada
Dudley Carleton, 1st Viscount Dorchester (1573–1632), English diplomat

Historic bishops of Dorchester:
- For the bishops in Wessex, see Bishop of Winchester
- For the bishops in Mercia, see Bishop of Lincoln
Bishop of Dorchester, modern episcopal title
Dorchester Abbey, in Dorchester, Oxfordshire
Dorchester Friary, in Dorset, England