Peter John Stewart (born 8 August 1947) is a British male former middle-distance runner.

[1] He also competed in the 1500 metres at the 1971 European Athletics Championships that year, but failed to make the final.

He also competed for Scotland at the 1970 British Commonwealth Games, narrowly missing out on a medal in fourth place.

[6] At the Emsley Carr Mile, he took back-to-back titles in 1971 and 1972, following on from his brother's victory the previous year.

[7] Their younger sister Mary won gold in the 1500m representing England at the 1978 Commonwealth Games.