Pembrokeshire is a maritime county, bordered by the sea on three sides, by Ceredigion (Cardiganshire) to the northeast and by Carmarthenshire to the east.

The population (United Kingdom Census 2001) was 114,131. The administrative headquarters and historic county town is Haverfordwest and other settlements include Pembroke itself, Pembroke Dock, Milford Haven, Fishguard, Tenby, Saundersfoot, Narberth, Neyland and Newport. St David's, in the west of the county, is the United Kingdom's smallest city.

The highest point of the county is at Foel Cwmcerwyn (1759 ft/536 m).