Cornhill-on-Tweed is a small village and civil parish in Northumberland, England about 1 mile to the east of Coldstream, Scotland. The hamlets of West Learmouth and East Learmouth are located to the south and west of the village respectively.
A mile north-west of the village, on a spur above the River Tweed are the earthwork remains of Cornhill Castle.
Cornhill-on-Tweed lies at a junction of the A697 and A698 roads - the latter linking to Berwick-upon-Tweed, the nearest significant town, some away.
The village lacks any schools, so pupils are sent to schools nearby. It formerly had a school known as Cornhill School, which was built in 1837 and closed in 2012.