Mamaroneck High School
#56
Best ACT in New York High Schools
1,660
Students
12.9:1
S:T Ratio
School Snapshot
Key metrics at a glance1,300
A
29
A
21
A+
36%
C+
13:1
A-
This Week at Mamaroneck – June 21, 2026
225 students practicing on Varsity Tutors
Academic Resources
Typical courses and practice resources for students at Mamaroneck High School
Standardized Test Dates
Upcoming national, state, and school calendar dates that affect students at Mamaroneck High School.
National Tests
June 20, 2026 – July 4, 2026
SAT Score Release Date
June 23, 2026
ACT
June 24, 2026
ACT
July 1, 2026 – July 31, 2026
AP Score Release — All
July 6, 2026
ACT Photo Upload/Standby Deadline
July 11, 2026
ACT — National
State Assessments
June 9, 2026 – June 25, 2026
New York Regents Exams
School Milestones
June 25, 2026 – June 28, 2026
Graduation
June 25, 2026 – June 26, 2026
School End/Summer Start
July 1, 2026
Homeschool Notice of Intent Due
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1000 W Boston Post Rd, Mamaroneck, NY 10543
(914)220-3100
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Mamaroneck Union Free School District
Teachers & Staff
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Academic Calendar
Important dates, holidays, and school events
“It is the mission of the Mamaroneck Union Free School District to promote intellectual engagement and an appreciation of learning as an inherently rewarding activity, and to prepare students to function as responsible citizens in a multicultural world.”