Leavenheath is a village and civil parish in Suffolk, England, close to the Essex border.

The parish also contains the hamlets of Cock Street and Honey Tye, and in 2001 had a population of 1,373, falling slightly to 1,370 at the 2011 Census.

[1] The village was named after the Leaven Heath, an area of open land between Boxford, Bures, Nayland and Polstead.

The south-eastern part of the parish is covered by the Dedham Vale AONB, whilst the south-west contains a section of the Arger Fen SSSI.

In the east of the parish are The Carrs, a set of four ponds that feed the River Stour.