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 coachCarl Roman Abt (1850–1933), Swiss mechanical engineer who invented the Abt rack system for rack railwaysChristian Abt (born 1967), German racing driverDaniel Abt (born 1992), German racing driverFranz Abt (1819–1885), German composerGudrun Abt (born 1962), German athleteHans-Jürgen Abt, German race team managerJohn Abt (1904–1991), American lawyer and politicianKarl Friedrich Abt (1733–1783), German actor