John Douglas Moore (April 13, 1843 – September 19, 1917) was an Ontario farmer and political figure.
He represented Waterloo South in the Legislative Assembly of Ontario from 1890 to 1898 as a Liberal member.
He served as reeve for North Dumfries and was warden for Waterloo County in 1878.
He helped establish the Galt, Preston & Hespeler Railway.
In 1901, Moore was named county registrar, serving in that post until his death.