Ruth Catherine Grulkowski (December 9, 1930 – June 24, 2012) was a competitor in the gymnastics competition at the 1952 Summer Olympics in Helsinki.

She had three daughters (Cindy, Lisa, & Linda), and three grandchildren (Melissa, Bobby, & Carrie).

Ruth died on June 24, 2012, due to medical complications.

She later won the Amateur Athletic Union Women's National Championship Title in 1953 and 1954.

She was a member of the Lincoln Turners, the Chicago Acro Theater, and the Adagio Gymnastics Group.