John Coyne (died 1873) was Peel County's first representative in the Ontario Legislature.

A native of Toronto Township, this son of Mr. and Mrs. Edward Coyne, he received his education in Brampton at Brampton Public School . He was educated as a lawyer, and called to the Bar of Upper Canada in 1864.

Entering provincial politics in 1867, as a Conservative, he beat out Liberal candidate Robert Smith by just 46 votes (1118 to 1072). The number 1118 had a strange, but merely conicidental attraction to him, as proved by the next election in 1871. Posed against Chinguacousy's T. O. Bowles , he won again with 1118 votes, against 1059 Liberal nods.

He married Mary Catherine Scott , the youngest daughter of Brampton resident John Scott, in October 1867.

He passed on from a short illness in 1873, after serving only two years of his second term.