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
Canada
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
United States
Dorchester, Illinois
Dorchester, Iowa
Dorchester, Boston, Massachusetts
Dorchester Avenue (Boston)
Dorchester Pottery Works, an historic site in Massachusetts
Dorchester, Nebraska
Dorchester, New Hampshire
Dorchester, South Carolina
Dorchester, Texas
Dorchester, Wise County, Virginia
Dorchester, Wisconsin
Dorchester County, Maryland
Dorchester County, South Carolina
Military
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
People
Troy Dorchester (born 1970) Canadian chuckwagon racer
Alternate name
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
Titles
Marquess of Dorchester
Countess of Dorchester
Earl of Dorchester
Viscount Dorchester
Baron Dorchester
Religion
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
Other
3858 Dorchester, an asteroid
Dorchester Publishing, a book publisher in the United States
Dorchester Town F.C., an association football club from Dorchester, Dorset
Dennis Dorchester, a motorcoach autobus made by Dennis