Leathes Ham is a 6 hectare Local Nature Reserve in Lowestoft in Suffolk.

It is owned by Waveney District Council.

[1][2] In the medieval period this site was turbary, an area which was dug for peat, and it later flooded and became a lake.

[3] It has a reedbed, dykes, and marshes where wildfowl breed.

Flora include ragged robin and southern marsh orchid.