Career
Foreign other people named John Platt, see John Platt. He represented Prince Edward in the Canadian House of Commons from 1882 to 1891 as a Liberal member. He was born in Athol Township, Upper Canada, the son of Dyer Platt and Myria Morgan.
Platt was educated at the Fort Edward Institute in New York state and at Victoria University in Cobourg.
In 1872, Platt married Amelia Brnnscombe. He also served as a public school inspector and as surgeon for the militia.
Platt was editor and publisher for the Picton New Nation. He was defeated by Archibald Campbell Miller when he ran for reelection in 1891.
Platt later served as warden for Kingston Penitentiary from 1899 to 1913.
He died in Picton at the age of 79.