Renfrewshire () (Scots: Renfrewshire; Scottish Gaelic: Siorrachd Rinn Friù) is one of the 32 council areas of Scotland.
Located in the west central Lowlands, it is one of three council areas contained within the boundaries of the historic county of Renfrewshire, the others being East Renfrewshire to the east and Inverclyde to the west. It also shares borders with Glasgow, North Ayrshire and West Dunbartonshire, and lies on the southern bank of the River Clyde.
The term Renfrewshire may also be used to refer to the historic county, also known as the County of Renfrew or Greater Renfrewshire, with origins in the 16th century. The larger Renfrewshire, containing Renfrewshire, Inverclyde and East Renfrewshire, remains in use as a registration county and lieutenancy area as well as a joint valuation board area for electoral registration and local tax valuation purposes.