| Giulio Iellini | |
| Nationality: | Italian |
| Birth Place: | Trieste, Italy |
| Height Ft: | 6 |
| Height In: | 2.75 |
| Weight Lb: | 175 |
| Career Position: | Point guard |
| Career Start: | 1964 |
| Career End: | 1982 |
| Years1: | 1964–1975 |
| Team1: | Olimpia Milano |
| Years2: | 1975–1977 |
| Years3: | 1977–1981 |
| Team3: | Nuova Pallacanestro Vigevano |
| Years4: | 1981–1982 |
| Team4: | Polisportiva S.S. Lazio |
| Highlights: |
|
| Show-Medals: | yes |
Giulio Iellini (born 18 October 1947) is a retired Italian professional basketball player. In 2009, he was inducted into the Italian Basketball Hall of Fame.
Iellini won two EuroLeague championships, in 1966 and 1976.
Iellini was a part of the senior Italian national basketball teams that won bronze medals at the 1971 EuroBasket, and the 1975 EuroBasket. He was also on the Italian team that placed fourth at EuroBasket 1977. He also competed at the 1972 Summer Olympic Games, and at the 1976 Summer Olympic Games, and finished in fourth and fifth place, respectively.