Sea change, seachange or The Sea Change may refer to:

• Sea Change (Parker novel), a Jesse Stone novel by Robert B. Parker (2006)
• Sea Change (Armstrong novel), a children's book by Richard Armstrong (1948)
• Sea Change (Powlik novel), a thriller by James Powlik (1999)
• "The Sea Change", a short story by Ernest Hemingway in the collection Winner Take Nothing (1933)
• The Sea Change, a book by historian H. Stuart Hughes (1975)
• Sea Change, a young-adult novel by Aimee Friedman (2009)
• Sea Change, a poetry collection by Jorie Graham (2008)
• "Sea Change", a short story by Thomas N. Scortia (1956)
• A Sea-Change, a play by William Dean Howells (1888)

• Sea Change (album), a 2002 album by Beck
• Seachange (band), a band from Nottingham, United Kingdom
• "Sea Change", a song by Turin Brakes from Outbursts

• The Sea Change, a 1998 British-Spanish comedy film
• Jesse Stone: Sea Change, the fourth film in the Jesse Stone series, 2007
• SeaChange, an Australian drama television series
• "Sea Change" (The Transformers), a television episode
• Sea Change: The Gulf of Maine, a PBS Nova presentation

• Sea change (idiom), an English idiomatic expression for broad transformation, drawn from a phrase in Shakespeare's The Tempest
• Seachange (demography), human migration from cities in favour of rural coastal communities
• Seachange (horse) (born 2002), New Zealand thoroughbred racehorse
• Sea Change (Northeast Harbor, Maine), U.S., a historic summer house
• SeaChange International, a video services software company, headquartered in Acton, Massachusetts.

• The Real Seachange, an Australian reality television series