 1890 to 1918

County councils were created in Scotland in 1890, and so the constituency area became also the county council area of Ross and Cromarty, minus the Fortrose, Dingwall and Cromarty parliamentary burghs.1918 to 1975

When reformed in 1918 the constituency covered the county of Ross and Cromarty (including the former parliamentary burghs) minus Lewis.1975 to 1983

County councils were abolished in 1975 and replaced with regions and districts and island council areas.