John Classon Miller (December 16, 1836 – April 2, 1884) was an Ontario lumber merchant and political figure.

He represented Muskoka and Parry Sound in the Legislative Assembly of Ontario from 1875 to 1882 as a Liberal member.

He was born in Yonge Township, Leeds County, Upper Canada in 1836 and entered business as a merchant at Seeleys Bay.

He moved to Toronto and was employed by the Ontario Crown Lands Department from 1868 to 1871, acting as superintendent of woods and forests.

He was reelected in 1879 but resigned in 1882 to contest the federal seat, losing to William Edward O'Brien by three votes.