West (or Western) Aberdeenshire was a Scottish county constituency of the House of Commons of the Parliament of the United Kingdom from 1868 to 1918 and from 1950 to 1983.
When created by the Representation of the People (Scotland) Act 1868, and first used in the 1868 general election, the Western Aberdeenshire constituency was nominally one of three covering the county of Aberdeen.
Western Aberdeenshire was defined by the 1868 legislation as consisting of the parishes of Aboyne and Glentanner, Alford, Auchindoir and Kearn, Auchterless, Birse, Chapel of Garioch, Clatt, Cluny, Coull, Crathie and Braemar, Culsalmond, Drumblade, Dyce, Echt, Forgue, Glenbucket, Glenmuick, Tullich and Glengairn, Huntly, Insch, Inverurie, Keig, Kemnay, Kildrummy, Kincardine O'Neil, Kinnellar, Kennethmont, Kintore, Leochel-Cushnie, Leslie, Logie-Coldstone, Lumphanan, Midmar, Monymusk, Newhills, Oyne, Peterculter, Premnay, Rayne, Rhynie, Skene, Strathdon, Tarland and Migvie, Tough, Towie, Tullynesle and Forbes, together with the part of the parish of Old Machar lying west of the River Don, and the parts of the parishes of Banchory-Devenick, Cabrach, Cairnie, Drumoak and Glass within the County of Aberdeen, and the parish of Gartly in Banffshire.
The House of Commons (Redistribution of Seats) Act 1949 created new boundaries for the 1950 general election, and West Aberdeenshire was created as one of four constituencies covering the county of Aberdeen and the county of city of Aberdeen.
West Aberdeenshire consisted of the burghs of Ballater, Inverurie, Kintore, and Oldmeldrum, and the districts of Aberdeen, Alford, Deeside, and Garioch.