Theiss may refer to:
Companies
edit- Theiss Aviation, an American aircraft manufacturer
- Konrad Theiss Verlag, a German book publishing company
People
edit- Brooke Theiss (born 1969), American actress
- Christine Theiss (born 1980), German female world champion in professional full contact kickboxing
- Mike Theiss (born 1978), American photographer
- William Ware Theiss (1930–1992), American costume designer
- Theiss., taxonomic author abbreviation of Ferdinand Theissen (1877–1919), German-Austrian mycologist
Places
edit- Lake Theiss or Lake Tisza
- Theiss River or Tisza