Justin Williams (born May 26, 1989) is a Belizean-American cyclist who currently is a rider-manager for UCI Continental team L39ION of Los Angeles.

[2][4][5][6] He focuses on increasing the diversity of the sport and founded and manages a team in order to mentor young African American and Hispanic riders.

[11] Williams knew there were not a lot of opportunities for black men in South-Central and saw cycling as a means to avoid getting in trouble with the law.

[3] With his professional career seemingly ended when he left the national team, Williams moved back to California and attended Moorpark College.

[3] He felt instantly at home with the other team members, and appreciated the lack of politics and drama that he had tired of on the UCI circuit.

[5] Williams found racing at the pro level difficult because he was the only minority, and that made him want to make the sport of cycling "great for everyone".

[7][13] As part of that effort, he mentors African American and Hispanic riders on his development team, Endo CNCPT.

[14] In August 2022, Williams was suspended from racing for 5 months as a result of his engaging in a fist fight with other racers at the Salt Lake Criterium.

[15] In August 2023, USA Cycling announced an investigation into Williams and Thomas Gibbons regarding a crash and confrontation that happened at the Denver Audi Littleton Criterium.