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Lewis S. Mills High School

Q: Is Lewis S. Mills High School a good school?

Lewis S. Mills High School ranks 19 th of 133 Connecticut high schools. SchoolDigger rates this school 4 stars out of 5.

Q: How many students attend Lewis S. Mills High School?

In the 2024-25 school year, 614 students attended Lewis S. Mills High School.

Q: What is the racial makeup of Lewis S. Mills High School?

Students at Lewis S. Mills High School are 65% White, 24% Two or more races, 9% Hispanic.

Q: What schools feed into Lewis S. Mills High School?

Lewis S. Mills High School is fed by the following schools: Elementary : Harwinton Consolidated School Elementary : Lake Garda Elementary School Middle : Har-Bur Middle School

Public Grades 9-12

19^th

SchoolDigger Rank ?

of 133 Connecticut High Schools

Better than 86% of Connecticut high schools

Summary

Lewis S. Mills High School is a moderately sized public high school in Burlington, CT, serving 614 students in grades 9–12 as part of Regional School District 10, a district ranked in the 75th percentile statewide. The school currently ranks 19th out of 133 Connecticut high schools in the 2025–2026 SchoolDigger rankings, placing it in the top tier of schools in the northwest Hartford/Litchfield County region, alongside well-regarded neighbors like Avon High School, Canton High School, and Farmington High School.

Academically, Mills performs well above state averages across all subjects. On 11th-grade assessments, 77% of students are proficient in ELA and 74.4% are proficient in science, compared to state averages of 55.3% and 50.5%. Its ELA scores are nearly identical to Canton High School (77.3%), and its science scores surpass Avon High School (71.2%). Math proficiency sits at 50% — more than 18 points above the state average — though it has been inconsistent in recent years, swinging from 54.5% to 36.8% to 40.9% before recovering to 50%. Farmington High School and Avon High School post higher math scores, but Mills remains competitive with the rest of the region.

Beyond test scores, Mills boasts an exceptionally high graduation rate of 98.3%, well above the state average of roughly 91%. Chronic absenteeism stands at 11.8% — lower than the state average and better than Avon High School, Canton High School, and Northwestern Regional High School, though slightly higher than Farmington High School's 10.5% — and reflects a sharp improvement from 24.8% the previous year. The school is also notably cost-efficient, spending about $16,139 per student, roughly $2,500–$3,500 less than several of its highest-performing neighbors, while delivering comparable or better outcomes in multiple areas. For families, Mills offers a strong combination of academic achievement, high graduation rates, and efficient use of district resources, with math performance and attendance trends being the two areas worth monitoring.

614

Students ?

11.4

Student/teacher ratio ?

$22,005

Per pupil spending ?

14.8%

Free/discounted lunch ?

26 Lyon Rd.
Burlington, CT 06013

(860) 673-0423

District: Regional School District 10

Feeder schools for Lewis S. Mills High School:

Elementary:	Harwinton Consolidated School
	Lake Garda Elementary School
Middle:	Har-Bur Middle School

Racial breakdown:

White:

64.8%

Two or more races:

23.8%

Hispanic:

9.4%

See top rated Connecticut high schools

Compare Lewis S. Mills High School to nearby high schools!

At a glance

▲ Ranking trend: Improving — 78th percentile in 2013 → 86th in 2026

Strengths

✓Test scores above the Connecticut average (67% vs 46% meeting standards)

✓Ranks in the top 14% of Connecticut high schools

✓98% graduate in 4 years — above the Connecticut average (91%)

Worth a look

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

Students meeting standards (2025-2026) ?

This school67%

District avg67%

Connecticut avg46%

19^th of 133

Connecticut public high schools ?

Top 14%▼ down 4 pts since 2016

From top 11% (2016) to top 14% (2026)

See the entire ranking list of Connecticut High Schools →

★★★★★

SchoolDigger rating ?

38^th of 153Regional School District 10 among Connecticut districts

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

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2026	85.9	19 of 133	85.7%	★★★★☆
2025	79.6	31 of 141	78.0%	★★★★☆
2024	79.4	31 of 145	78.6%	★★★★☆
2023	83.2	25 of 142	82.4%	★★★★☆
2022	77.6	34 of 139	75.5%	★★★★☆
2021	80.6	44 of 200	78.0%	★★★★☆
2018	90.1	18 of 121	85.1%	★★★★☆
2016	88.8	14 of 132	89.4%	★★★★★
2015	87.7	17 of 196	91.3%	★★★★★
2013	76.5	43 of 193	77.7%	★★★★☆
2012	79.5	24 of 188	87.2%	★★★★☆
2011	78.0	25 of 189	86.8%	★★★★☆
2010	77.7	28 of 186	84.9%	★★★★☆
2009	81.5	10 of 176	94.3%	★★★★★
2008	78.2	30 of 176	83.0%	★★★★☆
2007	78.0	27 of 176	84.7%	★★★★☆

Female

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2026	82.8	26 of 111	76.6%	★★★★☆
2025	82.7	22 of 104	78.8%	★★★★☆
2023	78.0	30 of 103	70.9%	★★★★☆
2021	79.9	39 of 189	79.4%	★★★★☆
2019	70.5	36 of 84	57.1%	★★★☆☆
2018	86.4	14 of 79	82.3%	★★★★☆

Male

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2024	78.8	26 of 100	74.0%	★★★★☆
2023	69.4	35 of 100	65.0%	★★★☆☆
2021	76.4	45 of 182	75.3%	★★★★☆
2019	77.2	30 of 80	62.5%	★★★☆☆
2018	84.8	19 of 78	75.6%	★★★★☆

Multi-racial

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2024	32.3	3 of 3	0.0%	★★★★☆
2021	61.1	2 of 3	33.3%	★★★★☆

Special Education

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2021	67.1	56 of 175	68.0%	★★★☆☆

White

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2026	74.3	28 of 107	73.8%	★★★★☆
2024	72.0	27 of 116	76.7%	★★★★☆
2023	63.0	43 of 116	62.9%	★★★☆☆
2022	54.5	57 of 117	51.3%	★★★☆☆
2021	60.7	60 of 155	61.3%	★★★☆☆
2019	66.6	43 of 113	61.9%	★★★☆☆
2018	83.1	18 of 105	82.9%	★★★★☆

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)

Female (2026)77th percentile-9 vs school

Male (2024)74th percentile-5 vs school

White (2026)74th percentile-12 vs school

Special Education (2021)68th percentile-10 vs school

Multi-racial (2024)<1st percentile-79 vs school

By subject vs Connecticut (2025-2026) ?

English Language Arts77%+22 vs state

Science74%+24 vs state

Math50%+19 vs state

★

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Schools Near Lewis S. Mills 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 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
Lewis S. Mills High School	Public	9-12	26 Lyon Rd.	Burlington	06013	Northwest Hills Planning Region	Regional School District 10	No	No	No	No	(860) 673-0423	614	54	11.4	14.8%	398 (64.8%)	2 (0.3%)	58 (9.4%)	5 (0.8%)	0 (0.0%)	1 (0.2%)	146 (23.8%)	85.9	19^th of 133 public high schools	85.7%		79.6	31^st of 141 public high schools	78.0%	12	74.4	77.0	50.0							$22,005
Canton High School	Public	9-12	76 Simonds Avenue	Canton	06019	Capitol Planning Region	Canton School District	No	No	No	No	(860) 693-7707	443	46	9.6	21.9%	348 (78.6%)	41 (9.3%)	28 (6.3%)	15 (3.4%)	0 (0.0%)	0 (0.0%)	11 (2.5%)	87.5	17^th of 133 public high schools	87.2%		90	14^th of 141 public high schools	90.1%	3	85.3	77.3	47.3							$25,743
Avon High School	Public	9-12	510 West Avon Rd.	Avon	06001	Capitol Planning Region	Avon School District	No	No	No	Yes	(860) 404-4740	946	81	11.7	14.5%	546 (57.7%)	61 (6.4%)	96 (10.1%)	205 (21.7%)	2 (0.2%)	0 (0.0%)	32 (3.4%)	89	13^th of 133 public high schools	90.2%		92.8	6^th of 141 public high schools	95.7%	7	71.2	82.4	58.6							$23,910
Farmington High School	Public	9-12	10 Monteith Dr	Farmington	06032	Capitol Planning Region	Farmington School District	No	No	No	No	(860) 673-2514	1,261	107	11.7	20.8%	619 (49.1%)	58 (4.6%)	152 (12.1%)	343 (27.2%)	2 (0.2%)	1 (0.1%)	77 (6.1%)								(n/a)	78.0									$22,349
Oliver Wolcott Technical High School	Public	9-12	75 Oliver St.	Torrington	06790	Northwest Hills Planning Region	Connecticut Technical Education and Career System	No	No	No	No	(860) 496-5300	643	53	12.2	36.4%	466 (72.5%)	7 (1.1%)	121 (18.8%)	1 (0.2%)	3 (0.5%)	0 (0.0%)	36 (5.6%)	26.8	87^th of 133 public high schools	34.6%		12.6	125^th of 141 public high schools	11.3%	38	44.1		5.8							$29,886
Torrington High School	Public	9-12	50 Major Besse Dr.	Torrington	06790	Northwest Hills Planning Region	Torrington School District	No	No	No	No	(860) 489-2294	1,034	87	11.9	62.3%	386 (37.3%)	81 (7.8%)	475 (45.9%)	57 (5.5%)	2 (0.2%)	2 (0.2%)	27 (2.6%)								(n/a)	32.7									$24,761
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%)	23.4	96^th of 133 public high schools	27.8%		49.9	62^nd of 141 public high schools	56.0%	34	30.0		15.7							$26,042
Bristol Eastern High School	Public	9-12	632 King St.	Bristol	06010	Naugatuck Valley Planning Region	Bristol School District	No	No	No	No	(860) 584-7876	998	78	12.8	48.1%	493 (49.4%)	88 (8.8%)	305 (30.6%)	57 (5.7%)	0 (0.0%)	1 (0.1%)	50 (5.0%)	61.6	50^th of 133 public high schools	62.4%		57.5	59^th of 141 public high schools	58.2%	9	68.4	58.8	28.1							$22,543
Bristol Arts and Innovation Magnet School	Public	6-12	70 Memorial Boulevard	Bristol	06111	Capitol Planning Region	Bristol School District	No	(n/a)	No	(n/a)	(860) 584-7007	268	26	10.4	54.5%	113 (42.2%)	26 (9.7%)	96 (35.8%)	7 (2.6%)	0 (0.0%)	0 (0.0%)	26 (9.7%)								(n/a)				43.0	52.3	53.0	39.3	34.9	41.0	$23,294
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%)	48.4	68^th of 133 public high schools	48.9%		49.9	63^rd of 141 public high schools	55.3%	5	62.1	46.7	23.8							$21,509

Frequently Asked Questions about Lewis S. Mills High School

What schools feed into Lewis S. Mills High School?

Lewis S. Mills High School is fed by the following schools:

Elementary : Harwinton Consolidated School
Elementary : Lake Garda Elementary School
Middle : Har-Bur Middle School

Is Lewis S. Mills High School a good school?

Lewis S. Mills High School ranks 19^th of 133 Connecticut high schools. SchoolDigger rates this school 4 stars out of 5.

How many students attend Lewis S. Mills High School?

In the 2024-25 school year, 614 students attended Lewis S. Mills High School.

What district is Lewis S. Mills High School in?

Regional School District 10

What is the racial makeup of Lewis S. Mills High School?

Students at Lewis S. Mills High School are 65% White, 24% Two or more races, 9% Hispanic.

Rate Lewis S. Mills High School!

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Schools in Burlington, CT

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Latest Connecticut data All new data »

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

2025–26 NGSS, SAT & SBAC test scoresNewAug 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.