Yekaterina Illarionovna Mikhailova-Demina (; 22 December 1925 – 24 June 2019) was a Russian military doctor. She was the only woman to have served in front-line reconnaissance in the Soviet marines during World War II. She reportedly carried hundreds of men off the battlefield and was seriously wounded three times during her career as a medic with the marines. For many years, Mikhailova-Demina was not awarded for her efforts during the war. In 1990, she was honoured by President Mikhail Gorbachev with the title of Hero of the Soviet Union.
Mikhailova-Demina was born in Leningrad. She died on 24 June 2019 in Moscow, at the age of 93.