Hermiston is a hamlet formerly in the county of Midlothian and now part of Edinburgh, the capital of Scotland. It is north of Heriot-Watt University's Riccarton Campus and west of the Hermiston Gait commercial development. Hermiston is bounded by the A71 Calder Road to the south and the Union Canal to the north with the M8 motorway just beyond. A park and ride site serving western Edinburgh is located south-west of the A71 Calder Road roundabout.