Eartham is a village and civil parish in the District of Chichester in West Sussex, England located 8.5 kilometres (5.3 mi) north east of Chichester east of the A285 road.
There is an Anglican parish church dedicated to St Margaret and a public house, The George, formerly The George and Dragon. The adjoining Manor Farm is the centre of a large farming enterprise. Nearby is Eartham House designed by Sir Edwin Lutyens which has been used since the 1920s as a private preparatory (junior) school, Great Ballard School. Eartham Wood to the north is an area of open access woodland, mostly beech trees through which the Roman road Stane Street runs. The route here today is followed only by bridleways and footpaths, and within Eartham Wood is part of the Monarch's Way long-distance path.
The parish has a land area of 836 hectares (2066 acres). In the 2001 census 104 people lived in 42 households, of whom 48 were economically active.