Greatham is a village and civil parish in the East Hampshire district of Hampshire, England. It is 1.9 miles north of Liss, just off the A3 which runs between London and Portsmouth, it has good transport links which in turn has made it popular with Commuters. The nearest railway station is 1.9 miles south of the village in Liss.
It is a small village, about 6 miles north of Petersfield, Hampshire, 10 miles south of Farnham, Surrey and 8 miles miles east of Alton, Hampshire. The population of Greatham is just over 800 people living in around 400 houses.
At the north end of the village is Longmoor Military Camp where remains of the Longmoor Military Railway can be seen, and the new Woolmer Link road, re-routing the A325 from Farnham to join the A3 at Longmoor Camp, by-passing the village. Traffic calming within the village aims to discourage through traffic.