Sidney James Parker (born 15 September 1930) is a former New Democratic Party member of the House of Commons of Canada.

His first campaign against Stan Graham of the Progressive Conservative party in the 1979 federal election was unsuccessful.

Parker won alternate terms in Parliament against Graham, first gaining the seat in 1980 election, losing in 1984, then returning to Parliament in the 1988 election.

Parker was defeated in the 1993 election by Jim Abbott of the Reform party.

Parker left national politics after serving in the 32nd and 34th Canadian Parliaments.