Herbert Sylvester Clements (November 8, 1865 – November 30, 1939) was a Canadian politician.
Born in Dover Township, Canada West, a manufacturer and farmer, he was first elected to the House of Commons of Canada in the 1904 federal election for the Ontario electoral district of Kent West.
A Conservative, he was defeated in 1908.
He was elected in the 1911 elections for the British Columbia riding of Comox—Atlin.
He was re-elected in 1917 to the redistributed seat, then named Comox-Alberni, where he was defeated in 1921.