Data Files

This page provides access to data files showing past constituencies for use in a geographical information system (GIS). 

Data files of current UK Parliament constituencies are available in Ordnance Survey's Boundary-Line™ product. Boundary-Line™ is part of Ordnance Survey's OS Open Data™ products which are available free of charge.

UK Parliament constituencies

UK Parliament Constituencies 4th Review 1995 - 2005

UK Parliament Constituencies 3rd Review 1983 - 1995

UK Parliament Constituencies 2nd Review 1974 - 1983

UK Parliament Constituencies 1st Review 1955 - 1974

UK Parliament Constituencies Initial Review 1950 - 1955

UK Parliament Constituencies 1918-1950

Terms of Use - Historical GIS Data