Carter Bar is a point on the England–Scotland border, in Roxburghshire and Northumberland.
Carter Bar is where the A68 road crosses the border and forms a pass located at the top of Redesdale in the Cheviot Hills at an elevation of 418m.
The nearest Scottish towns are Jedburgh Hawick, and Kelso, and on the English side, Byrness, Redesdale and Otterburn. From Carter Bar, Newcastle upon Tyne is 45mi away and the Scottish capital, Edinburgh, 58mi. The A696–A68 route is a popular scenic tourist route between Newcastle and Edinburgh.