is a small village in Berwickshire
in the Scottish Borders
, about 22 miles west of Berwick-upon-Tweed
, which is in England
. It is in the Lammermuir Hills
, and the Dye Water
runs through the village, flowing east to join the Whiteadder Water
nearby. The opera Lucia di Lammermoor
was set in Longformacus.
The Southern Upland Way long distance path passes through the village.