| Bob Deas | |
| Fullname: | Robert Deas |
| Birth Date: | 17 September 1886 |
| Birth Place: | Port Melbourne, Victoria |
| Death Place: | Parkville, Victoria |
| Originalteam: | Leopold |
| Debutdate: | Round 1, 1909 |
| Debutteam: | South Melbourne |
| Debutopponent: | Geelong |
| Debutstadium: | Corio Oval |
| Height: | 180 cm |
| Weight: | 82 kg |
| Statsend: | 1917 |
| Years1: | 1909–1917 |
| Club1: | South Melbourne |
| Games Goals1: | 111 (73) |
Robert Deas (17 September 1886 – 1 April 1960)[1] was an Australian rules footballer who played with South Melbourne in the Victorian Football League (VFL).
After kicking four goals on his debut in the opening round of the 1909 season, Deas played every game that year up until the club's second final. He was recalled however for the 1909 Grand Final where he played as a centre-half forward in a two-point win. He finished the year with 29 goals and kicked a further 26 the following season. From 1912 onwards he was used as a fullback and played in South Melbourne's losing Grand Final teams of 1912 and 1914.