Ian Davidson Brewer (15 June 1936 – 15 April 2010) was an Australian rules footballer with a distinguished career between 1956 and 1970, in the three major leagues of his era: the Victorian Football League (VFL), West Australian National Football League (WANFL) and South Australian National Football League (SANFL). Brewer played a combined total of 171 senior games for Collingwood, Claremont and Norwood. Brewer transferred to Norwood in 1965, topping the SANFL goal-kicking records that same year. His younger brother Ross also played in the VFL.