Rank
34
A-
Groton-Dunstable
3 schools · 1 high school · 2 elementary schools · Dunstable, Groton · Regional District
Groton-Dunstable Regional School District serves two towns north of Boston in the Nashoba Valley region—Groton and Dunstable—and ranks #34 overall among Massachusetts districts. Both towns are suburban communities with solid single-family assessed home values in the mid-$700,000s, and Groton in particular has a notably high per capita income of over $93,000. The district maintains a strong 97.2% graduation rate, with Groton-Dunstable Regional High School ranked #37 statewide. Groton is home to conservation areas and has deep colonial roots, while the region offers a blend of residential character and proximity to Route 2 employment corridors.
Avg MCAS ELA
63.7%
#64 of 326
Avg MCAS Math
68.7%
#36 of 326
Avg SAT
1,212
#40 of 290
Attendance
95%
#44 of 328
Graduation Rate
97.2%
#83 of 288
AP Pass Rate
84.8%
#62 of 278
Per-Pupil Spending
$22,031
#154 of 325
Avg Teacher Salary
$91,218
#166 of 325
MCAS Performance by Grade
| Grade | ELA M+E% | Math M+E% | Sci M+E% | Avg Score | Students |
|---|---|---|---|---|---|
| Grade 3 | 59% | 64% | — | 506 | 188 |
| Grade 4 | 57% | 66% | — | 507 | 171 |
| Grade 5 | 52% | 44% | 63% | 501 | 176 |
| Grade 6 | 61% | 55% | — | 504 | 190 |
| Grade 7 | 64% | 59% | — | 507 | 180 |
| Grade 8 | 60% | 60% | 57% | 507 | 187 |
| Grade 10 | 75% | 74% | 63% | 515 | 179 |
| HS Science | — | — | 62% | 508 | 165 |
Showing 2025 data
Student Demographics
White: 80.6%
Asian: 8.4%
Hispanic: 4.6%
Black: 2.1%
Multi-Race: 3.9%
Am. Indian: 0.2%
Pac. Islander: 0.1%
Female: 47.4%Male: 52.5%
High Schools in Groton-Dunstable
Rank
Grade
School
SAT
MCAS ELA
MCAS Math
AP
Grad
37
A-
Groton Dunstable Regional
SAT
1,212
ELA
76%
Math
75%
Grad
97.2%
37
A-
Groton Dunstable Regional
1,212
76%
75%
84.8%
97.2%
Elementary Schools in Groton-Dunstable
Rank
Grade
School
MCAS ELA
MCAS Math
Attend.
Class Size
160
B+
Swallow/Union School
ELA
54%
Math
67%
Attend.
95.7%
Class
21
160
B+
Swallow/Union School
54%
67%
95.7%
21
191
B+
Florence Roche School
ELA
61%
Math
64%
Attend.
95.4%
Class
21
191
B+
Florence Roche School
61%
64%
95.4%
21
District Operations
Attendance
#44 of 328Attendance Rate95%
Avg Days Absent9
Chronically Absent (10%+)8.9%
Chronically Absent (20%+)1.7%
Per-Pupil Expenditure
#154 of 325In-District Per Pupil$20,960
Total Per Pupil$22,031
Total FTE Students2,418
Teacher Salaries
#166 of 325Average Salary$91,218
Teacher FTE Count185
Salary vs. Town Income1.1x(near town avg)
Teacher salary is 1.1x the town's per capita income ($81,794). Teachers earn close to the community average. The MA median ratio is about 1.9x.
Class Size & Populations
#248 of 327Avg Class Size19
English Learners2.1%
Students w/ Disabilities18.8%
Total Students2,324
Staffing & Retention
#170 of 327Teacher Retention87.4%
Principal Retention100%
Total Teachers190
Attendance: 2024-2025 · Expenditure: 2024 · Salaries: 2023-2024 · Class Size: 2024-2025 · Staffing: 2025
Town Data
Dunstable
Avg Assessed Value
$745,497
#79 of 235
Avg Tax Bill
$9,982
Income Per Capita
$70,544
#41 of 235
Tax Bill Rank
#66
of 341 towns
Avg Assessed Value is the mean assessed value of single-family homes only (MA property class 101 — excludes condos, multi-family, and apartments). MA law requires assessment at 100% of fair market value. Income Per Capita is total town income divided by population, derived from MA state income tax returns (not Census surveys). It includes wages, investment income, and capital gains, so wealthy towns can have very high figures. The MA median is about $48K. Tax bill rank orders towns by average single-family tax bill, highest to lowest.
Tax & Bond Details
Residential Tax Rate1.34%
Tax as % of Income14.15%(typical)
Tax rate is the effective residential rate (tax bill ÷ assessed value). Tax as % of income measures how much of residents’ income goes to property taxes. The MA median is about 14%; below 10% is low (wealthier towns with high incomes relative to home values), above 16% is above average.
New Growth
$11.4M+1.36% levy growth(typical)
Residential$10.3M
Commercial/Industrial$1.1M
Residential Share89.99%(mostly homes)
New growth measures new taxable value from construction and development (not rising home prices). In Massachusetts, Proposition 2\u00BD limits annual property tax increases to 2.5% of the prior year\u2019s levy. New growth revenue is automatically added on top of this 2.5% base increase \u2014 it does not require a vote. This town’s total levy growth is about 3.9% (2.5% base + 1.36% from new growth). The MA median is about 1.2%; above 1.5% is strong, below 0.8% signals limited development. The residential share (89.99%) shows how much comes from homes vs. commercial/industrial. When most growth is residential, homeowners carry more of the tax burden. More commercial/industrial growth is generally better for homeowners because businesses share the cost.
Municipal Free Cash
$965K7.2% of operating budget
Free cash is the town's unencumbered surplus funds. 5-10% of budget is considered healthy. Operating budget: $13.3M.
Groton
Avg Assessed Value
$761,388
#79 of 235
Avg Tax Bill
$11,253
Income Per Capita
$93,044
#41 of 235
Tax Bill Rank
#50
of 341 towns
Avg Assessed Value is the mean assessed value of single-family homes only (MA property class 101 — excludes condos, multi-family, and apartments). MA law requires assessment at 100% of fair market value. Income Per Capita is total town income divided by population, derived from MA state income tax returns (not Census surveys). It includes wages, investment income, and capital gains, so wealthy towns can have very high figures. The MA median is about $48K. Tax bill rank orders towns by average single-family tax bill, highest to lowest.
Tax & Bond Details
Residential Tax Rate1.48%
Tax as % of Income12.09%(typical)
Bond RatingAAA(highest)
Tax rate is the effective residential rate (tax bill ÷ assessed value). Tax as % of income measures how much of residents’ income goes to property taxes. The MA median is about 14%; below 10% is low (wealthier towns with high incomes relative to home values), above 16% is above average. Bond rating reflects the town’s creditworthiness for borrowing. AAA is the highest possible rating (strong fiscal management), meaning the town can borrow at the lowest interest rates. AA+ is excellent, AA is very good.
New Growth
$34.0M+1.36% levy growth(typical)
Residential$29.4M
Commercial/Industrial$4.6M
Residential Share86.47%(mostly homes)
New growth measures new taxable value from construction and development (not rising home prices). In Massachusetts, Proposition 2\u00BD limits annual property tax increases to 2.5% of the prior year\u2019s levy. New growth revenue is automatically added on top of this 2.5% base increase \u2014 it does not require a vote. This town’s total levy growth is about 3.9% (2.5% base + 1.36% from new growth). The MA median is about 1.2%; above 1.5% is strong, below 0.8% signals limited development. The residential share (86.47%) shows how much comes from homes vs. commercial/industrial. When most growth is residential, homeowners carry more of the tax burden. More commercial/industrial growth is generally better for homeowners because businesses share the cost.
Municipal Free Cash
$2.6M4.9% of operating budget
Free cash is the town's unencumbered surplus funds. 5-10% of budget is considered healthy. Operating budget: $53.8M.