Johnston is a village, parish and community in the former hundred of Roose, Pembrokeshire, Wales, and a parish in the diocese of Diocese of St David's.

It lies on the A4076 road approximately midway between Haverfordwest and the port of Milford Haven and is served by Johnston railway station.

The parish church has the typical tall, slim castellated tower of churches in the largely English-speaking south of Pembrokeshire, sometimes known as "Little England beyond Wales".

[10] Johnston Community Council, has limited control over aspects of the running of the village.

In 2017 it moved into a newly built building, previously it had been on its former site for approximately 30–35 years.

The places of worship are all located at the southern end of the village.

[13] The nearby Baptist chapel was built in the first half of C20 in a modern style.

A meetinghouse for the Church of Jesus Christ of Latter-day Saints (LDS Church) was opened in December 2012 and is home to the Milford Haven Branch.

It opened in August 1934 and was trading in 1948 but the regularity of the racing in unknown.