Zwettl is a town in Lower Austria, Austria.
Zwettl may also refer to:
SC Zwettl, an Austrian football club playing in Zwettl Zwettl Abbey, a Cistercian monastery in Zwettl, in the Diocese of St. Pölten Zwettl (district), a district of the state of Lower Austria
See also Zwettl an der Rodl, a municipality in the district of Urfahr-Umgebung, Upper Austria