Nepean may refer to:
Electorates Division of Nepean, former federal electorate in New South Wales Electoral district of Nepean, state electoral district in Victoria, Australia Electoral district of Nepean (New South Wales), former state electoral district in New South Wales Nepean (federal electoral district), a Canadian electoral district covering Nepean and other parts of western Ottawa Nepean—Carleton (federal electoral district), former Canadian electoral district (1979 to 1988, 1997 to 2015) Nepean—Carleton (provincial electoral district), former Canadian electoral district (1999 to 2014)
Organisations and institutions Nepean College of Advanced Education, a former higher education institution in Western Sydney, Australia Nepean Creative and Performing Arts High School, Sydney, Australia Nepean Hospital, Kingswood, New South Wales, Australia Nepean Observatory, an observatory, part of Western Sydney University at Werrington North, New South Wales UWS Nepean, a former campus of Western Sydney University
People Nepean (surname), several people with the surname Nepean baronets, a baronetcy created in Dorset, England, UK
Places Australia Nepean Bay, a bay in South Australia Nepean Bay Conservation Park, a protected area in South Australia, Nepean Bay, South Australia, a locality Nepean Highway, Victoria Nepean Island (Norfolk Island) Nepean Island, Queensland Nepean River, NSW Point Nepean, Victoria
Canada Ontario Kìwekì Point, a hill overlooking the Ottawa River in Ottawa, Ontario, formerly known as Nepean Point Nepean, Ontario Nepean Bay (Canada), on the Ottawa River, Ontario Nepean Township, Ontario British Columbia Nepean Sound, British Columbia
See also Hawkesbury and Nepean Wars (1794–1816), a series of conflicts between British forces and Indigenous clans in the area west of Sydney Nepean Sea Road, Mumbai, India Nepean Stars F.C., a football club in Sierra Leone