Rennison Flint "Ren" Manners (February 5, 1904 – December 26, 1944) was a Canadian ice hockey centre who played 37 games over two seasons in the National Hockey League for the Pittsburgh Pirates and Philadelphia Quakers between 1929 and 1931.

Manners played for the NHL's Pittsburgh Pirates during the 1929–30 season, collecting three goals and two assists in 33 games.

Manners only played four games for the Philadelphia club and spent most of his time with the Niagara Falls Cataracts of the Ontario Professional Hockey League.

In 1931, he was reinstated as an amateur and played in a few leagues in the Ottawa area before joining the Montagnards for one last season in 1933–34.

[1] [2] This biographical article relating to a Canadian ice hockey centre born in the 1900s is a stub.