Selby is a local government district of North Yorkshire, England. The local authority, Selby District Council, is based in the town of Selby and provides services to an area which includes Tadcaster and a host of villages.
The district was formed on April 1, 1974 by the merger of Selby Urban District and parts of Derwent Rural District, Hemsworth Rural District, Osgoldcross Rural District and Tadcaster Rural District. Of these, Derwent Rural District was in the historic East Riding of Yorkshire, the rest being in the West Riding of Yorkshire.
On April 1, 1996 the parishes of Acaster Malbis, Askham Bryan, Askham Richard, Bishopthorpe, Copmanthorpe, Deighton, Dunnington, Elvington, Fulford, Heslington, Kexby, Naburn and Wheldrake were all transferred from the district to form part of the new City of York unitary authority. According to the 2001 census these parishes had a population of 22,873.
As a result Selby is now geographically isolated from much of the rest of North Yorkshire, and it had been suggested in now-moot plans in association with regional assemblies that it would be better annexed to the East Riding of Yorkshire unitary authority than with any of the other North Yorkshire districts.