Edwin Walter "Teddy" Rankin (11 March 1872 – 31 July 1944) was an Australian rules footballer, originally with Riversdale, who began playing with Geelong in the VFA in 1891, and later played in the Victorian Football League (VFL).

The son of Walter Rankin (1849–1930), and Sarah Rankin, née Austin, Edwin Walter Rankin was born in Geelong, Victoria on 11 March 1872.

Two of his brothers played for Geelong Football Club: Tom Rankin (1881–1958), 47 games (1904–1906), and Samuel John Rankin (1872–1958) (who was never selected in the VFL team's First XVIII).

Rankin married Louisa Jane Johns in 1892, which lasted until her death in 1906. He married Adelaide Isabel Hyde (1885–1971) in 1909.

Two of his sons from his first marriage, Bert Rankin (1893–1971) and Cliff Rankin (1896–1975), were captains of the Geelong Football Club (1925–1927 and 1923 respectively); and both were selected to play for Victoria in 1923.

A son from his second marriage, Doug Rankin (1915–1987), also had a brief but successful career with the club, playing just nine senior games in two seasons (1938–1939).

Eileen O'Donnell (née Rankin) was the daughter of Teddy and Adelaide Rankin and the sister of Bert, Cliff and Doug Rankin. In April 1937, Eileen married Leo O'Donnell, and they moved into Anderson Street, East Geelong. Eileen and Leo had two sons, Ian and Graeme O'Donnell. Graeme played for Geelong and North Melbourne during 1960s. He was also the father of both Gary O'Donnell and Shelley O'Donnell. Gary played for Essendon between 1987 and 1998 and Shelley is a former Australia netball international.

Georgie Rankin, an AFL Women's player with Geelong is the great-granddaughter of Teddy Rankin.