Marina Shmonina (born 9 February 1965 in Tashkent, Uzbek SSR) is an athlete who represented the Soviet Union, Russia and later Uzbekistan. She specialized in the 400 metres and 4 x 400 metres relay.
She competed for the Unified Team at the 1992 Summer Olympics, in the heats of the relay competition. When the team of Yelena Ruzina, Lyudmila Dzhigalova, Olga Nazarova and Olga Bryzgina won the final, Shmonina was also awarded the gold medal. Shmonina was hailed in Uzbekistan as the first Uzbek athlete to win an Olympic gold medal. 
- At both the 1990 Europeans and 1992 Olympics Shmonina ran in the heats but not the final.
- At the 1993 World Indoors, the Russians were the original winners in 3:28.90. They were disqualified due to Shmonina failing a drugs test.
- 1972: East Germany (Käsling, Kühne, Seidler, Zehrt)
- 1976: East Germany (Maletzki, Rohde, Streidt, Brehmer)
- 1980: Soviet Union (Prorochenko, Goyshchik, Zyuskova, Nazarova)
- 1984: United States (Leatherwood, S. Howard, Brisco-Hooks, Cheeseborough, Dixon, D. Howard)
- 1988: Soviet Union (Ledovskaya, Nazarova, Pinigina, Bryzhina, Dzhigalova)
- 1992: Unified Team (Ruzina, Dzhigalova, Nazarova, Bryzhina, Nurutdinova, Shmonina)
- 1996: United States (Stevens, Malone-Wallace, Graham, Miles, Wilson)
- 2000: United States (Miles Clark, Hennagan, Colander, Anderson)
- 2004: United States (Trotter, Henderson, Richards, Hennagan, Robinson)
- 2008: United States (Wineberg, Felix, Henderson, Richards, Hastings)
- 2012: United States (Trotter, Felix, McCorory, Richards-Ross, Baker, Dixon)