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Thomaston High School

Public Grades 7-12

Summary

Thomaston High School is a small public school in Thomaston, CT, serving about 307 students in grades 7 through 12. The school is part of the Thomaston School District, a district that consistently graduates nearly all of its students—a fact that stands out as the school's greatest strength.

For parents, the headline news is a 100% graduation rate, which is well above the state average of 91.2% and higher than many nearby towns. In fact, it outpaces comparable schools like Wolcott High School (95.6%) and Watertown High School (92.4%). The school also shines in the middle grades, where 7th and 8th graders score well above state averages in English, math, and science. These positives are supported by a low student-teacher ratio of 10.7 and high per-student spending, which allows for a resource-rich, supportive environment.

The biggest red flag is a sharp drop in math proficiency by 11th grade. While 8th graders in 2025-2026 were about 19 points above the state average in math, only 17.4% of 11th graders met the SAT math benchmark, compared to 31.3% statewide. This puts Thomaston well behind peer towns like Wolcott (33.3%) and Watertown (29.1%). The school also has moderate chronic absenteeism at 17.2%, which is in line with the state average but higher than expected given its resources and low poverty rate. In short, Thomaston is a school that is exceptionally successful at graduating students, but parents should ask questions about how the high school prepares students for college-level math. For context, it performs well against large Waterbury comprehensive high schools like Wilby High School, though more selective magnet schools in the region post stronger academic results.

307

Students ?

10.7

Student/teacher ratio ?

$26,698

Per pupil spending ?

35.8%

Free/discounted lunch ?

185 Branch Rd.
Thomaston, CT 06787

(860) 283-3030

District: Thomaston School District

Feeder schools for Thomaston High School:

Elementary:	Black Rock School
Middle:	Thomaston Center School

Racial breakdown:

White:

82.7%

Hispanic:

11.1%

Two or more races:

3.3%

See top rated Connecticut public schools

Compare Thomaston High School to nearby high schools!

At a glance

▲ Ranking trend: Improving — 59th percentile in 2007 → 71st in 2021

Strengths

✓100% graduate in 4 years — above the Connecticut average (91%)

✓Ranking is trending up — up 12 percentile points since 2007

✓Small classes — about 11 students per teacher

Worth a look

!Some student groups rank well below the school's overall statewide standing

!Math scores 14 pts below the Connecticut average

Students meeting standards (2025-2026) ?

This school50%

District avg44%

Connecticut avg47%

71^st of 258

Connecticut public middle schools ?

Top 28%▲ up 12 pts since 2016

From top 39% (2016) to top 28% (2026)

See the entire ranking list of Connecticut Middle Schools →

★★★★★

SchoolDigger rating ?

Statewide rank percentile over time (100 = the top-ranked school in the state; click a legend item to add a student group)

Middle school ranking

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2026	73.8	71 of 258	72.5%	★★★★☆
2025	72.3	77 of 252	69.4%	★★★★☆
2024	55.6	108 of 250	56.8%	★★★☆☆
2023	48.9	122 of 249	51.0%	★★★☆☆
2022	39.0	137 of 250	45.2%	★★☆☆☆
2021	55.9	113 of 275	58.9%	★★★☆☆
2019	55.9	118 of 259	54.4%	★★★☆☆
2018	65.1	99 of 249	60.2%	★★★☆☆
2017	70.0	76 of 250	69.6%	★★★☆☆
2016	61.7	97 of 246	60.6%	★★★☆☆
2015	72.9	84 of 280	70.0%	★★★★☆
2013	70.5	106 of 278	61.9%	★★★☆☆
2012	72.9	90 of 272	66.9%	★★★☆☆
2011	68.3	117 of 269	56.5%	★★★☆☆
2010	63.3	134 of 268	50.0%	★★★☆☆
2009	57.7	142 of 255	44.3%	★★☆☆☆
2008	46.0	163 of 252	35.3%	★★☆☆☆
2007	58.3	131 of 250	47.6%	★★☆☆☆
2006	57.4	136 of 248	45.2%	★★☆☆☆

Female

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2021	59.4	92 of 235	60.9%	★★★☆☆

Male

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2021	49.6	107 of 224	52.2%	★★★☆☆

White

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2025	45.0	90 of 153	41.2%	★★☆☆☆
2023	19.7	130 of 158	17.7%	★☆☆☆☆
2021	31.8	123 of 175	29.7%	★★☆☆☆
2019	30.2	123 of 166	25.9%	★☆☆☆☆
2018	42.9	103 of 168	38.7%	★★☆☆☆

High school ranking

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2021	74.2	58 of 200	71.0%	★★★★☆
2019	67.3	51 of 121	57.9%	★★★☆☆
2015	51.8	102 of 196	48.0%	★★☆☆☆
2013	64.5	93 of 193	51.8%	★★★☆☆
2012	68.8	83 of 188	55.9%	★★★☆☆
2011	55.0	115 of 189	39.2%	★★☆☆☆
2010	68.9	76 of 186	59.1%	★★★☆☆
2009	59.9	98 of 176	44.3%	★★☆☆☆
2008	64.5	88 of 176	50.0%	★★★☆☆
2007	68.3	72 of 176	59.1%	★★★☆☆

Female

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2021	70.2	65 of 189	65.6%	★★★☆☆

White

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2026	6.1	104 of 107	2.8%	☆☆☆☆☆
2025	39.3	73 of 116	37.1%	★★☆☆☆
2024	37.6	71 of 116	38.8%	★★☆☆☆
2021	57.7	68 of 155	56.1%	★★★☆☆
2019	41.9	81 of 113	28.3%	★☆☆☆☆

How student groups rank statewide ? (each group's percentile vs the same group at other schools — higher is better; the +/- beside each compares the group with this school's overall percentile)

Middle school

Female (2021)61st percentile~ school

Male (2021)52nd percentile-7 vs school

White (2025)41st percentile-28 vs school

High school

Female (2021)66th percentile-5 vs school

White (2026)3rd percentile

By subject vs Connecticut (2025-2026) ?

English Language Arts59%+8 vs state

Mathematics59%+16 vs state

Math17%-14 vs state

★

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Schools Near Thomaston High School

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Ranking:

E Elementary M Middle H High A Alternative P Private

Choose columns to see: Summary School Students/Teachers Ranking Test Scores Finance All

School													Students/Teachers											Ranking (2026)				Ranking (2025)				NGSS Science (2026)		SAT English Language Arts (2026)	SAT Math (2026)	SBAC English Language Arts (2026)			SBAC Mathematics (2026)			Per Pupil Expenditures (2025)
Name	Type	Grades	Address	City	Zip	County	District	Is Charter	Is Magnet	Is Virtual	Is Title I	Phone	Enrollment	Full-time Teachers	Student/ Teacher Ratio	Free/Discounted Lunch Recipients (2025)	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2026)	Statewide Rank (2026)	State Percentile (2026)	SchoolDigger Rating (2026)	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	Rank Change from Previous Year	NGSS Science 8th Grade	NGSS Science 11th Grade	SAT English Language Arts 11th Grade	SAT Math 11th Grade	SBAC English Language Arts 6th Grade	SBAC English Language Arts 7th Grade	SBAC English Language Arts 8th Grade	SBAC Mathematics 6th Grade	SBAC Mathematics 7th Grade	SBAC Mathematics 8th Grade	Total
Thomaston High School	Public	7-12	185 Branch Rd.	Thomaston	06787	Naugatuck Valley Planning Region	Thomaston School District	No	No	No	No	(860) 283-3030	307	29	10.7	35.8%	254 (82.7%)	5 (1.6%)	34 (11.1%)	4 (1.3%)	0 (0.0%)	0 (0.0%)	10 (3.3%)								(n/a)	799.0	1078.0		17.4		59.3	2566.0		56.9	61.1	$26,698
Terryville High School	Public	9-12	33 North Harwinton Avenue	Terryville	06786	Naugatuck Valley Planning Region	Plymouth School District	No	No	No	No	(860) 314-2777	337	32	10.6	54.3%	244 (72.4%)	7 (2.1%)	60 (17.8%)	5 (1.5%)	4 (1.2%)	0 (0.0%)	17 (5.0%)	23.9	96^th of 135 public high schools	28.9%		49.9	62^nd of 141 public high schools	56.0%	34		30.0		15.7							$26,042
Watertown High School	Public	9-12	324 French St.	Watertown	06795	Naugatuck Valley Planning Region	Watertown School District	No	No	No	No	(860) 945-4810	693	66	10.5	40.4%	539 (77.8%)	27 (3.9%)	93 (13.4%)	10 (1.4%)	1 (0.1%)	1 (0.1%)	21 (3.0%)	50.9	66^th of 135 public high schools	51.1%					(n/a)		47.7	57.6	29.1							$26,352
Wilby High School	Public	9-12	568 Bucks Hill Rd.	Waterbury	06704	Naugatuck Valley Planning Region	Waterbury School District	No	No	No	Yes	(203) 574-8100	1,196	83	14.4	84.9%	60 (5.0%)	307 (25.7%)	764 (63.9%)	7 (0.6%)	3 (0.3%)	0 (0.0%)	55 (4.6%)	7.9	130^th of 135 public high schools	3.7%		6.6	137^th of 141 public high schools	2.8%	7		13.0	14.2	8.1							$19,547
W. F. Kaynor Technical High School	Public	9-12	43 Tompkins St.	Waterbury	06708	Naugatuck Valley Planning Region	Connecticut Technical Education and Career System	No	No	No	Yes	(203) 596-4302	831	71	11.6	51.7%	231 (27.8%)	133 (16.0%)	401 (48.3%)	10 (1.2%)	4 (0.5%)	2 (0.2%)	42 (5.1%)	31.3	82^nd of 135 public high schools	39.3%		27.7	93^rd of 141 public high schools	34.0%	11		45.8	42.0	14.6							$28,587
Wolcott High School	Public	9-12	457 Bound Line Rd.	Wolcott	06716	Capitol Planning Region	Wolcott School District	No	No	No	No	(203) 879-8164	611	60	10.1	30.9%	445 (72.8%)	33 (5.4%)	96 (15.7%)	17 (2.8%)	0 (0.0%)	0 (0.0%)	20 (3.3%)	51.6	64^th of 135 public high schools	52.6%					(n/a)		36.1	64.6	33.3							$21,527
Bristol Central High School	Public	9-12	480 Wolcott St.	Bristol	06010	Naugatuck Valley Planning Region	Bristol School District	No	No	No	No	(860) 584-7735	1,148	82	14.0	53.3%	498 (43.4%)	103 (9.0%)	445 (38.8%)	34 (3.0%)	0 (0.0%)	0 (0.0%)	63 (5.5%)	48.6	68^th of 135 public high schools	49.6%		49.9	63^rd of 141 public high schools	55.3%	5		62.1	46.7	23.8							$21,509
REGIONS staff secure Waterbury	Public	6-12	80 Prospect Street	Waterbury	06702	Naugatuck Valley Planning Region	Judicial Centers	No	(n/a)	No	(n/a)	(203) 757-9939	0	0			0 ()	0 ()	0 ()	0 ()	0 ()	0 ()	0 ()								(n/a)
Waterbury Arts Magnet School	Public, Magnet	6-12	16 South Elm St.	Waterbury	06706	Naugatuck Valley Planning Region	Waterbury School District	No	Yes	No	Yes	(203) 573-6300	820	68	12.0	68.0%	234 (28.5%)	151 (18.4%)	378 (46.1%)	12 (1.5%)	2 (0.2%)	0 (0.0%)	43 (5.2%)	24.2	94^th of 135 public high schools	30.4%		22.7	103^rd of 141 public high schools	27.0%	9	53.2	1094.0	42.9	13.4	57.4	57.3	73.0	38.0	27.3	40.5	$22,835
Waterbury Career Academy	Public	9-12	175 Birch Street	Waterbury	06704	Naugatuck Valley Planning Region	Waterbury School District	No	No	No	Yes	(203) 574-8000	709	59	11.9	78.0%	92 (13.0%)	184 (26.0%)	387 (54.6%)	19 (2.7%)	6 (0.8%)	0 (0.0%)	21 (3.0%)	44.5	69^th of 135 public high schools	48.9%		28	91^st of 141 public high schools	35.5%	22		47.8	58.0	19.3							$21,089

Frequently Asked Questions about Thomaston High School

What is the racial makeup of Thomaston High School?

Students at Thomaston High School are 83% White, 11% Hispanic, 3% Two or more races, 2% African American, 1% Asian.

What schools feed into Thomaston High School?

Thomaston High School is fed by the following schools:

Elementary : Black Rock School
Middle : Thomaston Center School

How many students attend Thomaston High School?

In the 2024-25 school year, 307 students attended Thomaston High School.

What district is Thomaston High School in?

Thomaston School District

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Latest Connecticut data All new data »

2024–25 through 2025–26 attendance data & graduation ratesAug 31, 2026

2025–26 NGSS, SAT & SBAC test scoresAug 31, 2026

2024–25 school spending dataApr 2, 2026

2024–25 attendance dataNov 6, 2025

SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the Connecticut Department of Education.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.