The parish was in the hundred of Roose, at the heart of Little England beyond Wales, and has been largely English-speaking since the 12th century, when it was settled by Flemish immigrants.

[8] The parish church, a medieval Grade II listed building, is dedicated to St Jerome.

[12] In 2014, residents of the village performed a musical piece to mark the centenary of the beginning of World War I.

Entitled "WW1 – A Village Opera", the work, written by Pembrokeshire author and poet Peter George, with music by Llangwm resident Sam Howley, wove the stories of villagers affected by the war into the greater political narrative of the buildup to war.

The festival has welcomed various people including Griff Rhys Jones, Tristan Gooley, Ferdinand Mount, Diana Darke, David Horspool and Brian John to talk about such subjects as Wales, comedy, history, tragedy and navigation.