Peeblesshire, the County of Peebles or Tweeddale is a historic county of Scotland. Its county town is Peebles, and it borders Midlothian to the north, Selkirkshire to the east, Dumfriesshire to the south, and Lanarkshire to the west.

Tweeddale is a committee area and lieutenancy area in the Scottish Borders council area in south-eastern Scotland. It had also been a province in the Middle Ages. From 1975 to 1996 it was a local government district. Its boundaries correspond to the historic county of Peeblesshire.