Horsenden is a hamlet and former civil parish, now in the parish of Longwick-cum-Ilmer, in Buckinghamshire, England. It is approximately one mile West of Princes Risborough, seven miles south of Aylesbury and three miles south-west of Chinnor in Oxfordshire. The Icknield Way passes just to the north of the village from north-east to south-west, although there is no connecting road through the hamlet itself. In 1931 the parish had a population of 53.