Demi Frances Runas (born 1991) is an American professional golfer who is currently on the LPGA Tour.

Runas attended University of California, Davis where she was a member of the golf team.

In 2009–10, she had seven top-20 finishes, including a runner-up showing at the Juli Inkster Spartan Invitational.

She capped her Big West tournament debut with a 1-over 73, tied for lowest of the day.

Runas made her LPGA Tour debut on January 8, 2015, at the Coates Golf Championship finishing 6-over after two rounds and missing the cut.