Corsewall Point, or Corsill Point, is the headland at the northwestern end of the Rhins of Galloway, in Dumfries and Galloway, west of Scotland.
Corsewall Point is the southeasterly boundary point between the Firth of Clyde and the North Channel, with the southerly tip of the Kintyre Peninsula the northwest point. The North Channel is customarily considered as part of the Irish Sea.
The Rhins (or Rhinns) of Galloway is a double-headed peninsula in southwestern Scotland. It takes the form of a hammerhead projecting into the Irish Sea, terminating in the north at Corsewall and Milleur Points and in the south at the Mull of Galloway (the southernmost point of Scotland). It is connected to the rest of Wigtownshire by an isthmus, washed on the north by Loch Ryan and on the south by Luce Bay. From end to end, the peninsula measures 28 miles (45 kilometres). It takes its name from the Gaelic word rinn, meaning "point".
The principal settlements are Stranraer at the head of Loch Ryan and the small tourist village of Portpatrick on the west coast. Other villages are dotted up and down the peninsula, including Kirkcolm, Leswalt, Lochans, and, in the South Rhins, Stoneykirk, Sandhead, Ardwell, and Drummore.
The North Channel (known in Irish and Scottish Gaelic as Sruth na Maoile, in Scots as the Sheuch) is the strait between north-eastern Ireland and south-western Scotland. The Firth of Clyde merges with the channel, between the southern tip of the Kintyre peninsula and Corsewall Point on the Rhins of Galloway. Part of the Irish Sea, the channel begins north of the Isle of Man and runs north-west into the Atlantic Ocean. Within the channel is Beaufort's Dyke, the deepest part of which is 312 metres (1,024 ft).