Maria Grigoryevna Isakova (Russian: Мария Григорьевна Исакова; 5 July 1918 – 25 March 2011), nicknamed Cinderella of Vyatka, was a World Champion speed skater.

She was born in Vyatka (now Kirov), Russian SFSR, and competed for the Soviet Union.

Her speed prompted people in Vyatka to tell her to enter the Soviet Allround Championships.

This made her the first female speed skater to become World Champion three times and, since her titles were consecutive, the first female speed skater to become World Champion in three consecutive years.

An overview of medals won by Isakova at important championships she participated in, listing the years in which she won each: Over the course of her career, Isakova skated one world record on the old Medeo natural icerink at Alma-Ata: To put these personal records in perspective, the WR column lists the official world records on the dates that Isakova skated her personal records.