Foyle can refer to:
- The River Foyle in Ireland
- Lough Foyle, the river's estuary
- Several organisations and divisions that take their name from the river including:
- Foyle (Assembly constituency)
- Foyle (Northern Ireland Parliament constituency)
- Foyle (UK Parliament constituency)
- Foyle and Londonderry College, a grammar school in Derry
- Ulsterbus Foyle, the Derry based bus operator
- Foyles, a bookshop in London
- Kitty Foyle, a 1940 film
- Adonal Foyle, a basketball player.
- Martin Foyle, a footballer and manager
- Detective Chief Superintendent Christopher Foyle, the protagonist of the TV series Foyle's War.
- Foyle, a parody of the character Ray Doyle in The Professionals, and partner of Bonehead in the Comic Strip films The Bullshitters and Detectives on the Edge of a Nervous Breakdown.