| Marian Zieliński | |
| Birth Date: | 24 December 1929 |
| Birth Place: | Chełm, Poland |
| Death Date: | 13 October 2005 (aged 75) |
| Death Place: | Warsaw, Poland |
| Height: | 160 cm |
| Sport: | weightlifting |
| Coach: | Józef Styczyński |
| Club: | Legia Warszawa |
| Show-Medals: | yes |
Marian Zieliński (24 December 1929 – 13 October 2005) was a Polish weightlifter. He competed at the 1956, 1960, 1964 and 1968 Olympics and won bronze medals in 1956, 1964 and 1968, placing fourth in 1960.He held the world and European titles in 1959 and 1963. Zieliński set three ratified world records: two in the snatch in 1958 and one in the clean and jerk in 1964.
Zieliński took up weightlifting in the early 1950s, and retired in 1970. He then coached weightlifters until 1978, and after that worked as a painter, sculptor and jeweler. He was married to Jadwiga Nienartowicz and had two sons, Andrzej (born 1958) and Mark (born 1960), both live in Canada.