Devenish may refer to:
In geography:
- Devenish, County Fermanagh, a parish in County Fermanagh, Northern Ireland
- Devenish, Victoria, a town in Australia
- Devenish Island, an island in Northern Ireland
In people:
- Olivia Mariamne Devenish (1771–1814), British socialite
In sport:
- Devenish St. Mary's GAC, a Gaelic Athletic Club situated in Garrison, County Fermanagh, Northern Ireland