Midlothian is a historic county, registration county, lieutenancy area and one of 32 council areas of Scotland used for local government. Midlot…Midlothian is a historic county, registration county, lieutenancy area and one of 32 council areas of Scotland used for local government. Midlothian lies in the east-central Lowlands, bordering the City of Edinburgh council area, East Lothian and the Scottish Borders.