Johnstown is a village (and former electoral ward) in Wrexham County Borough, Wales, and forms part of the old coal mining community of Rhosllannerchrugog.

It is thought to have been named after John Bury, a mid 19th century member of Wrexham's first Town Council, who built a number of houses in the area.

The nearby clay quarry was used as a landfill site for waste from Liverpool.

[2] Johnstown is a located on the historic earth work of Offa's Dyke.

There are two public houses in Johnstown; The New Inn and The Grapes In April 2012, a planning application was submitted by developers Capital & Centric Plc for a new supermarket on the disused Griflex industrial unit, potentially creating 300 jobs for the area.