Marlborough School District

Marlborough School District is home to just one school, Elmer Thienes-Mary Hall Elementary School, an elementary school serving grades PK through 6 with 458 students in a suburban Connecticut community.

Because this is the only school in the district, it is automatically the standout institution, and it performs impressively. It holds a 4-star rating for three consecutive years and ranks in the 78th percentile among Connecticut elementary schools for 2025-2026, up slightly from the 76th percentile the prior year. Academically, the school exceeds state proficiency averages in every subject and grade tested. For example, 5th grade math proficiency is 77.8% compared to 45.8% statewide, a remarkable 32-point advantage, and 6th grade ELA stands at 72.3% versus 51.2% statewide. Even in areas that saw year-over-year declines, such as 4th grade math dropping from 76.8% to 62.5%, the school remains well above the state average of 52.1%.

Beyond test scores, the school benefits from a very low chronic absenteeism rate of 5.3% — less than one-third of the state's 16.4% — which supports consistent learning. With only 18.56% of students qualifying for free or reduced-price lunch, the school serves a relatively low-poverty population. A low student-teacher ratio of 12.1:1 and per-student spending of $16,414 further contribute to a supportive environment. Parents should note that the district and school are the same entity, and since there are no middle or high schools in Marlborough, students typically transition to another district or regional system after 6th grade. Overall, this is a consistently high-performing elementary school with strong resources, excellent attendance, and academic results in the top quarter of the state.