Hadleigh Hamlet became a civil parish in 1866. In 1889 it became part of the administrative county of West Suffolk, in 1894 it became part of Cosford Rural District. On 1 April 1935 the parish was abolished and merged into Boxford and Kersey.[3] In 1974 the area became part of the non-metropolitan district of Babergh in the non-metropolitan county of Suffolk.