Seaver is a surname, and may refer to:
- Benjamin Seaver (1795–1856), American politician from Massachusetts; mayor of Boston 1852–53
- Ebenezer Seaver (1763–1844), American politician from Massachusetts; U.S. representative 1803–13
- Fred Jay Seaver (1877-1970), American mycologist
- Hideo Seaver (contemporary), American voice actor
- Jay Webber Seaver (1855-1915), American physician and pioneer of anthropometry
- Michael Seaver (born 1967), Irish musician and dance critic
- Robert Chauncey Seaver (fl. 1907), American amateur tennis player
- Thomas O. Seaver (1833–1912), American army officer during the American Civil War; recipient of the Medal of Honor
- Tom Seaver (born 1944), American professional baseball player
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