Leonard Cecil "Len" Grosvenor (b. July 21, 1905 in Ottawa, Ontario – d. March 15, 1981 in Ottawa, Ontario) was a professional ice hockey centre who played 144 games in the National Hockey League. He played for the Ottawa Senators, New York Americans, and Montreal Canadiens. Grosvenor played for the senior Ottawa Rideaus of the Ottawa City Senior League from 1925 to 1927. In 1927 he was signed as a free agent by the Ottawa Senators. He played two and a half seasons with the Seanators before being sent down to the London Panthers in 1929-30. Grosvenor was back up with the Senators in 1930-31.