County Borough of Ipswich
The County Borough of Ipswich was established as the local government district covering the town of Ipswich, East Suffolk in 1889. It replaced the Municipal Borough of Ipswich which had been established in 1835. Both originated from the ancient borough of Ipswich. The local authority was Ipswich Corporation. In 1974 it was replaced by the non-metropolitan district of Ipswich and Ipswich Borough Council became the local authority, with county council duties fulfilled by Suffolk County Council. Following the Local Government Act 1888, the county of Suffolk outside of Ipswich was split into East Suffolk and  West Suffolk for administrative purposes and the term administrative county was introduced. There was a level of continuity as Ipswich was still run by the Ipswich Corporation, independently from East Suffolk (which surrounded it), although the county council was based in Ipswich at East Suffolk County Hall. The county borough of Ipswich was abolished in 1974 following the Local Government Act 1972 and Ipswich became a non-metropolitan district with borough status in the county of Suffolk.