Karl Kaspar Keffer (1882 – October 22, 1955) was a Canadian professional golfer.

He was the head professional at the Royal Ottawa Golf Club for over thirty years until his retirement in 1943 due to ill health,[5] and was a founder member of the PGA of Canada.

[6] His biggest achievements as a tournament player came in the national open championship, which he won twice, in 1909 and 1914, and finished as runner-up in 1919.

He also won the provincial opens of Manitoba and Quebec.

[1] Keffer has been widely recognised for his achievements and contributions to golf, highlighted by his induction into the Canadian Golf Hall of Fame in 1986.