Abt is a German surname derived from the clerical title of Abbot. Notable people with the surname include:
Alexander Abt (born 1976), Russian figure skater and coach
Carl Roman Abt (1850–1933), Swiss mechanical engineer who invented the Abt rack system for rack railways
Christian Abt (born 1967), German racing driver
Daniel Abt (born 1992), German racing driver
Franz Abt (1819–1885), German composer
Gudrun Abt (born 1962), German athlete
Hans-Jürgen Abt, German race team manager
John Abt (1904–1991), American lawyer and politician
Karl Friedrich Abt (1733–1783), German actor