Leah Falland (née O'Connor; born 30 August 1992) is an American steeplechase runner and NCAA DI indoor track and field championships record holder in the mile run.

O'Connor was raised in Croswell, Michigan where she first learned to run on her family farm.

[3] She attended Croswell-Lexington High School and was state champion in the 800 m and 1600 m.[2] She competed collegiately for the Michigan State Spartans track and field and cross country teams starting in 2011, and qualified for the NCAA Division I Women's Outdoor Track and Field Championships every year from 2012 to 2015.

[6] In 2018, Falland set the Drake Relays record in the steeplechase with a time of 9:32.23.

[8] From August 2020 to October 2022, Falland was a member of the professional training group On Athletics Club and was coached by Dathan Ritzenhein.