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Local government in Denbigh has changed shape more than once. The first Denbighshire County Council was established under the Local Government Act 1888, taking over administrative responsibilities previously held by the quarter sessions, and ran from 1889 until 1974.
Under the Local Government Act 1972, Denbighshire was merged with most of Flintshire to form the new county of Clwyd, whose county council administered the wider region from 1974 until its abolition in 1996. Welsh local government was reorganised again that year, and the modern Denbighshire County Council was created on 1 April 1996 as a unitary authority — a single council responsible for the full range of local services, rather than a two-tier system of county and district councils.
Today's Denbighshire County Council is based at County Hall in Ruthin, Denbighshire's county town, a few miles south of Denbigh — putting Denbigh's local seat of government just down the road, in the same Vale of Clwyd it has shared history and geography with for centuries.
Denbigh falls within Denbighshire County Council, a unitary authority responsible for local services across the county, with its main administrative offices based in the county town of Ruthin rather than in Denbigh itself. At a more local level, Denbigh Town Council represents the town's own residents on matters of immediate civic concern, from local events to town centre maintenance.
This two-tier structure of town and county government is typical of small Welsh market towns, and Denbigh's own civic history — visible in buildings like the Town Hall and the former Shire Hall — reflects centuries of local self-governance stretching back to its medieval borough charter.