Nina Grigoryevna Otkalenko (née Pletnyova; Russian: Нина Григорьевна Откаленко; 23 May 1928 – 13 May 2015) was a Soviet middle-distance runner. She won a European title in the 800 m at the inaugural 1954 European Athletics Championships and set multiple world records in this event in 1951–54. She missed the 1952 and 1956 Olympics, where women's middle-distance events were not part of the program, and the 1960 Olympics due to an injury.