Curtis Hudson "Trey" Allen III[1] (born November 20, 1974)[2] is an American lawyer who serves as an associate justice of the North Carolina Supreme Court.

During his service, Allen was deployed to Iraq and was a member of the United States Marine Corps Judge Advocate Division.

[4] Allen later served as a law clerk for Paul Martin Newby and worked as an attorney at Tharrington Smith LLP in Raleigh, North Carolina.

He was the Albert and Gladys Hall Coates Distinguished Term associate Professor of Public Law and Government at the University of North Carolina at Chapel Hill and served as general counsel to the North Carolina Administrative Office of the Courts.

[5] Allen was elected to the North Carolina Supreme Court in November 2022, unseating incumbent Democrat Sam J. Ervin IV.