Leith ( /ˈliːθ/ LEETH; Scottish Gaelic: Lìte) is a district and former municipal burgh to the north of the city of Edinburgh at the mouth of the Water of Leith in Scotland. It has long been regarded as Edinburgh's port. It lies on the south shore of the Firth of Forth, in the unitary local authority of the City of Edinburgh.

First referred to in the charter authorising the construction of Holyrood Abbey, Leith officially became Edinburgh's port in 1329 when Robert I transferred control to the magistrates and citizens of Edinburgh. It remains a busy port, handling over 1.5 million tonnes of cargo a year.