Parker Alys Valby (born September 27, 2002) is a professional American track and field and cross-country athlete.

Her sophomore year she finished runner-up to Katelyn Tuohy in the 5000m at the NCAA Track and Field Championships by running a personal best of 15:20:10.

[8][9] The following fall, Valby once again finished runner-up to Tuohy but this time at the NCAA Cross Country Championships in Oklahoma.

[10] That spring, she won the 5000m at the 2023 NCAA Track and Field Championships helping Florida finish as team runner-up.

[11] Valby started out her redshirt junior season strong by winning the Wisconsin Nuttycombe invite over rival Katelyn Tuohy in a course time of 19:17.2.

She ran a new NCAA record time of 18:55.2 for the 6 km course to win by 10 seconds ahead of Doris Lemngole of the University of Alabama.