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The boundaries of the constituency, as set out in the Representation of the People (Scotland) Act 1832, were-
"From the North-western Corner of the North Inch, on the Right Bank of the River Tay, in a straight Line to the Bridge on the Mill Lead at the Boot of Balhousie; thence in a straight Line to the Bridge on the Glasgow Road over the Scouring Burn; thence in a straight Line to the Southern Corner of the Water Reservoir of the Dept; thence in a straight Line to the Southern Corner of the Friarton Pier on the River Tay; thence across the River Tay (passing to the South of the Friarton Island) to the Point at which the same is met by the Boundary of the respective Parishes of Kinfauns and Kinnoul; thence, Northward, along the Boundary of the Parish of Kinfauns to the Point at which the several Boundaries of the Properties of Kinfauns, Kinnoul, and Barnhill meet; thence in a straight Line to the North-eastern Corner of Lord Kinnoul's Lodge, at the Gate of Approach to Kinnoul Hill; thence in a straight Line to the North-eastern Corner of the Enclosure of the Lunatic Asylum; thence in a straight Line to the Point at which the Annatty Burn crosses the Blairgowrie Road; thence down the Annatty Burn to the Point at which the same joins the River Tay; thence in a straight Line to the Point first described."
Prior to the 1832 general election, the county (including the detached parishes) had been covered by the Perthshire constituency and Perth Burghs. Perth Burghs consisted of the burgh of Perth and burghs in the county of Fife and the county of Forfar.
The Perth constituency was defined as consisting of the burghs of Abernethy, Alyth, Blairgowrie, Coupar Angus, Perth, and Rattray in the county of Perth and the Blairgowrie and Perth districts of the county, and the same boundaries were used for the general elections of 1922, 1923, 1924, 1929, 1931, 1935 and 1945.
For the 2005 general election, the Perth constituency was largely replaced by Ochil and South Perthshire, covering the Clackmannanshire council area and a southern portion of the Perth and Kinross council area. Perth and North Perthshire was created to cover the rest of the Perth and Kinross council area.