Location and coordinates are for the approximate centre of Johnston within this administrative area. Geographic features and populated places may cross administrative borders.
Gazetteer of the British Isles (Edinburgh: Bartholomew, 1887). John Bartholomew
Johnston, par. and ry. sta., Pembrokeshire, 4½ miles SW. of Haverfordwest, 1295 ac., pop. 209; P.O.; near the station is the seat of Johnston Hall.