John Silas Poole (June 25, 1872 in Kemptville, Ontario – December 29, 1963) was a politician in Manitoba, Canada.
Poole initially sat as a government backbencher, but left the coalition prior to the 1941 provincial election.
Re-elected by acclamation as an anti-coalition Conservative,[1] he returned to his party caucus after the election.
He again defeated Adalbert Poole, who was by this time a candidate of the Cooperative Commonwealth Federation, in the 1945 provincial election.
[1] He served as a government backbencher supporting the coalition, and did not seek re-election in 1949.