David Joseph Leahy was an Australian trade unionist and politician who was a Labor Party member of the Legislative Assembly of Western Australia from 1938 until his death, representing the seat of Hannans.
- Occupation
- trade unionist
- Position held
- Member of the Western Australian Legislative Assembly
- Citizenship
- Australia
- Born
- October 19, 1883
- Died
- December 19, 1948
