Nina Grigoryevna Otkalenko (née Pletnyova; Russian: Нина Григорьевна Откаленко; 23 May 1928 – 13 May 2015) was a Soviet middle-distance runner.

[2] In the 1950s Otkalenko became the most successful record breaker in the women's 800 m event.

Spearheading a significant improvement in women's times in the event over her career, her last world record of 2:05.0 minutes in 1955 stood for almost five years, before it was beaten by her compatriot Lyudmila Shevtsova.

[1][4] Outside of her European title, she won medals at the World Festival of Youth and Students, twice winning the 800 m title in 1953 and 1955, as well as taking 400 metres silver medals at both those championships.

[5] She was highly successful in domestic competition, ending her career with a total of 22 Soviet titles in track and field and cross country disciplines.