thumb|Middleham Lower Moor, near where Johnston trains

Mark Johnston (born 10 October 1959) is a Scottish racehorse trainer based in Middleham, North Yorkshire, England.

Born in Glasgow, he studied at the University of Glasgow and is a qualified vet. He started training at a stable near Louth, Lincolnshire in 1987, and his first winner was Hinari Video at Carlisle

In January 2022 Johnston's son and assistant trainer, Charlie, joined him as joint training licence holder. As joint trainers the pair were responsible for 176 winners in 2022. In December 2022 Mark Johnston announced that he would step down from the training licence, leaving Charlie as the sole trainer with Mark as assistant trainer. Johnston stressed that he wasn't retiring and the training partnership would continue as before.

The motto of the stable is "Always Trying".

He is married to Deirdre, a former teacher.

  • BBC profile
  • British Horseracing Board profile
  • National Thoroughbred Racing Association profile

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  • Mark Johnston website