Thiessen
- Alfred H. Thiessen
- Brad Thiessen
- Bradley Thiessen (statistician)
- Dan Thiessen
- Dan Thiessen (politician)
- Del Thiessen
- Duane D. Thiessen
- Georg Heinrich Thiessen
- Gordon Thiessen
- J. Grant Thiessen
- Jack Thiessen
- James Thiessen
- Jayson Thiessen
- Juliana Thiessen Day
- Marc Thiessen
- Matt Thiessen
- Nolan Thiessen
- Peter Adolf Thiessen
- Theiss (disambiguation)
- Theissen (disambiguation)
- Thiess (disambiguation)
- Thiessen (crater)
- Thießen
- Thissen (disambiguation)
- Thyssen (disambiguation)
- Tiffani Thiessen
- Vern Thiessen