thumb|Sow thistle
thumb|Sonchus flower, Wellington, New Zealand
Sow thistle most often refers to yellow flowered, thistle-like plants in the genus Sonchus.
Sow thistle may also refer to:
- Cicerbita, a genus of plants related to Sonchus, with blue, white, or yellow flowers.
See also
- Reichardia tingitana, false sow thistle
- Sonchus asper, the prickly sow-thistle
- Sonchus oleraceus, common sowthistle