The school's original location was on South Main Street, in a building constructed in 1916-1917 that today serves as Wallingford's Town Hall.

In the year 1957 the school was moved to its current location at 70 Pond Hill Rd, in southeast Wallingford.

Lyman Hall offers Spanish, French, Italian, and Latin language courses.

German is offered in place of Latin at Wallingford's sister school, Mark T. Sheehan High School Lyman Hall is a Regional Agricultural Science & Technology Education Center (formerly Vocational Agriculture).

Lyman Hall enrolls more than 300 students from Wallingford and nine surrounding towns for this program.