Thatcham is a town in Berkshire, England located 3 miles (5km) east of Newbury and 15 miles (24km) west of Reading. It covers approximately 8.75 square miles (23 km²) and has a population of 23,000 people (2003). This number has grown rapidly over the last few decades from 5,000 in 1951 and 7,500 in 1961.