Christchurch is a town and civil parish on the south coast of Dorset, England. The parish had a population of 31,372 in 2021. It adjoins Bournemouth to the west, with the New Forest to the east. Part of the historic county of Hampshire, Christchurch was a borough within the administrative county of Dorset from 1974 until 2019, when it became part of the new Bournemouth, Christchurch and Poole unitary authority.