Best Public Schools in Zip Code 06355

Zip code 06355 in Mystic, CT is served by 2 elementary schools—Mystic River Magnet School and Northeast Academy Magnet School—both part of the Groton School District and both serving grades PK through 5, with no middle or high schools in the area, meaning families must look outside 06355 for secondary education options. The district as a whole ranks 105 out of 153 districts in Connecticut (31st percentile), yet the two schools paint very different pictures of academic success.

Northeast Academy Magnet School is the clear standout in this zip code. It ranks in the 64th percentile statewide (178th out of 491 elementary schools), well above its district's ranking. The school exceeds Connecticut state averages in nearly every subject, with particularly strong results in 5th grade science (77.8% proficiency vs. 52.9% statewide) and 68.3% proficiency in both 5th grade ELA and math. Chronic absenteeism is just 6.9%—far below the district rate of 16.5% and the state rate of 16.4%—and only 36.73% of students qualify for free or reduced lunch. Its average proficiency across all 2025–2026 assessments is approximately 63.8%.

By contrast, Mystic River Magnet School faces considerable challenges. With an 81.35% free/reduced lunch rate—more than double Northeast Academy's—and a 17.3% chronic absenteeism rate, the school ranks in the 36th percentile statewide (316th out of 491). Its average proficiency across all assessments is about 42.9%, a roughly 21-point gap behind Northeast Academy, and it falls below state averages in 6 of 7 reported assessments. Despite having a slightly lower student–teacher ratio (11.9 vs. 12.5), Mystic River's test scores trail significantly. Both schools have seen small declines in their percentile rankings over the past three years, but the sharp contrast between them—same district, same grade span, same zip code—shows how much school-level demographics and local conditions can drive academic outcomes. Families choosing between these two elementary schools should weigh these differences carefully.