Greater Middlesex County Math League hosts six Varsity matches and four Junior Varsity matches each year for public and private high schools in Middlesex County.
The schools that participated in the league in the 2023–2024 season were:
Daniel Hand High School
Guilford High School
Haddam-Killingworth High School
Lyme-Old Lyme High School
Mercy High School
Portland High School
RHAM High School
Westbrook High School
Xavier High School
For further information, please contact atgargano@xavierhighschool.org.