Little Newcastle lies on the minor road from Letterston to Puncheston, Fishguard is seven miles and Haverfordwest 10.
The population is about 130. Slightly over half live in the village itself, the remainder in the surrounding countryside There are 16 children of school age or less, 35 senior citizens. 75 are Welsh speakers.
Economic activity in the area is based on self-employment Ė eight farms, two workshops, a car repairer, a builder, a racehorse trainer, a pub, a plumber, boarding kennels and a B&B. A significant number of other workers commute to nearby towns.