Dumfriesshire, alternately the County of Dumfries or Shire of Dumfries (Scottish Gaelic: Siorrachd Dhùn Phris), is a historic county and registration county in southern Scotland. The Dumfries lieutenancy area covers a similar area to the historic county.
In terms of historic counties it borders Kirkcudbrightshire to the west, Ayrshire to the north-west, Lanarkshire, Peeblesshire and Selkirkshire to the north, and Roxburghshire to the east. To the south is the coast of the Solway Firth, and on the other side of the border between Scotland and England the English county of Cumberland.