Ohashi was born on April 12, 1997, in Seattle, Washington, USA, to parents Diana and Richard Ohashi. Her mother is a former high school gymnast.
She is of Japanese and German descent.
Ohashi has three older brothers, Kalen, Kyle, and Ryan.
Katelyn began training in gymnastics at 3 years old.
Early in her career, Ohashi trained with Al Fong at Great American Gymnastics Express (GAGE) in Blue Springs, Missouri. Ohashi was twelve years old when she made her debut on the national gymnastics scene at the 2009 Junior Olympic National Championships. At the Championships, she placed first on floor exercise, tied for second on uneven bars, placed fourth in the all-around and tied for seventh on vault.
In 2006, Ohashi, her mother, and the youngest of her brothers, Kalen, moved to Kansas City, Missouri. Three years later they moved to Plano, Texas.
She attended Spring Creek Academy before graduating from Plano Senior High School in 2015. She began attending the University of California, Los Angeles in the fall of 2015 and majored in gender studies, graduating in 2019. Ohashi started gymnastics at age 3.
In 2015, Ohashi dropped from elite competition back to Level 10. Her first competition since 2013 was the Texas Prime Meet, where she performed only on vault, beam and floor.
Ѕhе wаѕ thе wіnnеr оf thе Веѕt Рlау ЕЅРY Аwаrd іn 2019.
Ѕhе wаѕ thе wіnnеr оf thе Веѕt Vіrаl Ѕроrtѕ Моmеnt ЕЅРY Аwаrd іn 2019.
Ѕhе hаѕ rесеіvеd fоur реrfесt tеn ѕсоrеѕ іn hеr саrееr tо dаtе.
Іn 2013, ѕhе bесаmе thе wіnnеr оf thе 2013 Аmеrісаn Сuр.
Height : 4 ft 9 in 1.51cm
Weight : 107.8Ibs 49 kg