Dalhousie (/dælˈhaʊzi/ dal-HOW-zee) may refer to:

• Dalhousie goby, species of fish found in central Australia
• Dalhousie hardyhead, species of fish found in central Australia
• Dalhousie catfish (Neosilurus gloveri), species of fish found in central Australia

• Dalhousie Castle, a castle near Bonnyrigg, Scotland
• Dalhousie Obelisk, a monument in Empress Place, Singapore
• Dalhousie Station (Montreal), a former passenger rail station in Montreal, Quebec
• Dalhousie station (Calgary), a LRT station in Calgary, Alberta

• Dalhousie Hilltop School, Dalhousie, India
• Dalhousie School, a former prep school in Scotland
• Dalhousie University, located in Halifax, Nova Scotia
• HMIS (later INS) Dalhousie, the initial name of INS Angre, the naval base at Mumbai, India

• Dalhousie, later name of HMS Hearty (1885)

• Clan Ramsay (Dalhousie), a branch of the main line of Scottish Ramsays
• Earl of Dalhousie, a title created in the Peerage of Scotland in 1633
• James Broun-Ramsay, 1st Marquess of Dalhousie, (1812–1860) a Governor-General of India
• George Ramsay, 9th Earl of Dalhousie, a Governor of Nova Scotia and of British North America

• County of Dalhousie, Victoria
• County of Dalhousie (South Australia)
• Dalhousie Springs, South Australia, a group of natural artesian springs
• Dalhousie Station (South Australia), a pastoral lease in the far north of South Australia

• Dalhousie, New Brunswick, a town in Restigouche County
• Dalhousie Parish, New Brunswick
• Dalhousie, Calgary, a neighbourhood in the northwest area of the city
• Dalhousie, Quebec, a small town in south-western Quebec
• Port Dalhousie, Ontario, a community in St. Catharines
• West Dalhousie, a community in Nova Scotia
• Dalhousie Road, Nova Scotia, a community
• Dalhousie Ward, Ottawa. Former ward in Ottawa.

• Dalhousie, India, a town in Himachal Pradesh
• Dalhousie Cantonment, a cantonment town in Himachal Pradesh
• Dalhousie (Vidhan Sabha constituency), which includes the previous two towns
• Dalhousie Square, former name of the B. B. D. Bagh central business district of Kolkata

• Dalhousie Mains, near Dalkeith and Bonnyrigg, former terminus of the Edinburgh and Dalkeith Railway

• Dalhousie, Sri Lanka, a town in Nuwara Eliya District

• Dalhousie Station (disambiguation)