Ross-shire, or the County of Ross, is a former county of Scotland. The county bordered on Sutherland, Cromartyshire (of which it contained many exclaves), Inverness-shire and an exclave of Nairnshire. It included most of Ross as well as Lewis in the Outer Hebrides. Dingwall was the traditional county town.

Ross-shire and Cromartyshire were combined in the single local government county of Ross and Cromarty under the Local Government (Scotland) Act 1889. In 1975, Ross and Cromarty was itself replaced by the Highland region and the Western Isles, under the Local Government (Scotland) Act 1973. The region became a unitary council area in 1996, under the Local Government etc. (Scotland) Act 1994.