Best Public Schools in Riverside, CT

Riverside, Connecticut is served by four public schools—three elementary schools and one middle school—all part of the highly ranked Greenwich School District, with no high school located in the city itself. Together, these schools enroll about 2,002 students and consistently rank among the best in the state, offering a K–8 pathway that feeds into Greenwich’s high schools.

Among elementary schools, North Mianus School is the top performer, ranked #1 in Connecticut for both 2024–2025 and 2025–2026, with proficiency rates near or above 90% in most subjects and the lowest student-to-teacher ratio at 10.2:1. Riverside School is nearly as strong, ranked #2 in 2025–2026 and #1 in 2023–2024, with the lowest chronic absenteeism in the group at 4.6%. Eastern Middle School, the only middle school, has held the #2 statewide ranking for three years running, with 8th grade science and math proficiency well above state averages. International School At Dundee is the lowest-ranked of the four but is improving quickly, moving from #32 to #17 in three years, and remains a 5-star school.

All four schools dramatically outperform Connecticut state averages in ELA, math, and science, and chronic absenteeism ranges from just 4.6% to 6.4% versus the state’s 16.4%. Free/reduced-price lunch eligibility is very low overall, though International School At Dundee serves a comparatively higher-need population at 10.5%. Per-student spending varies, with North Mianus spending the least ($17,213) while achieving the top ranking, and International spending the most ($22,395). Families should note that Riverside has no high school, so students leave the immediate area after 8th grade to attend Greenwich district high schools.