ALDERMASTON, a parish (formerly a market-town) in the hundred of THEALE, county of BERKS, 10 miles (S. W. by W.) from Reading, containing 653 inhabitants. The living is a vicarage, in the archdeaconry of Berks, and diocese of Salisbury, rated in the king's books at £12. 12. 85., and in the patronage of the Provost and Fellows of Queen's College, Oxford. The church is dedicated to St. Mary. Fairs are held on May 6th and July 7th. The navigable river Kemu't passes through the parish.