Peter Mauchan (1882 – 5 November 1943) was a Scottish footballer who played for Spanish club FC Barcelona at the turn of the century. He was part of the infamous group of Scottish workers that formed Escocès FC. Peter is often confused with his younger brother, David Mauchan, who is often wrongly credited with being the one who played for Escocès FC and FC Barcelona, which is not possible as David was only born in 1895.