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Haddam-Killingworth High School

Q: Is Haddam-Killingworth High School a good school?

Haddam-Killingworth High School ranks 16 th of 141 Connecticut high schools. SchoolDigger rates this school 4 stars out of 5.

Public Grades 9-12

16^th

SchoolDigger Rank ?

of 141 Connecticut High Schools

Better than 89% of Connecticut high schools

Summary

Haddam-Killingworth High School is a public high school serving grades 9-12 in Higganum, Connecticut, with a student population of 518. The school is part of the Regional School District 17, which is ranked 30 out of 156 districts in the state and has a 4-star rating from SchoolDigger.

Haddam-Killingworth High School consistently outperforms the state average on standardized tests, with 85.6% of 11th-grade students proficient or better in SAT/English Language Arts, 48.8% in SAT/Math, and 72.8% in NGSS/Science, compared to state averages of 58%, 31.1%, and 47.7%, respectively. The school also maintains high four-year graduation rates, ranging from 88.4% to 97.8% over the past few years, consistently outperforming the state average. With a relatively low student-teacher ratio of 10 to 10.7 students per teacher, the school provides a more personalized learning environment.

Compared to nearby schools, such as Cromwell High School, The Morgan School, and Middletown High School, Haddam-Killingworth High School outperforms them in academic metrics, including test scores and graduation rates. Additionally, the school's higher spending per student of $19,388 in 2018-2019 may contribute to its strong academic outcomes, and its relatively low percentage of students receiving free or reduced-price lunch, ranging from 10.11% to 13.9%, suggests a relatively affluent student population.

466

Students ?

9.5

Student/teacher ratio ?

$30,768

Per pupil spending ?

13.7%

Free/discounted lunch ?

95 Little City Road
Higganum, CT 06441

(860) 345-8541

District: Regional School District 17

Feeder schools for Haddam-Killingworth High School:

Elementary:	Burr District Elementary School
	Haddam-Killingworth Intermediate School
	Killingworth Elementary School
Middle:	Haddam-Killingworth Middle School

Racial breakdown:

White:

87.8%

Hispanic:

4.9%

Two or more races:

3.4%

See top rated Connecticut high schools

Compare Haddam-Killingworth High School to nearby high schools!

At a glance

▲ Ranking trend: Improving — 64th percentile in 2012 → 89th in 2025

Strengths

✓Test scores above the Connecticut average (69% vs 46% meeting standards)

✓Ranks in the top 11% of Connecticut high schools

✓96% graduate in 4 years — above the Connecticut average (89%)

Students meeting standards (2024-2025) ?

This school69%

District avg69%

Connecticut avg46%

16^th of 141

Connecticut public high schools ?

Top 11%▼ down 2 pts since 2015

See the entire ranking list of Connecticut High Schools →

★★★★★

SchoolDigger rating ?

30^th of 156Regional School District 17 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
2025	88.4	16 of 141	88.7%	★★★★☆
2024	85.9	18 of 145	87.6%	★★★★☆
2023	92.5	9 of 142	93.7%	★★★★★
2022	70.1	46 of 139	66.9%	★★★☆☆
2021	85.7	31 of 200	84.5%	★★★★☆
2019	84.8	22 of 121	81.8%	★★★★☆
2016	86.6	20 of 132	84.8%	★★★★☆
2015	87.3	19 of 196	90.3%	★★★★★
2013	76.1	46 of 193	76.2%	★★★★☆
2012	72.1	68 of 188	63.8%	★★★☆☆
2011	73.4	67 of 189	64.6%	★★★☆☆
2010	75.7	40 of 186	78.5%	★★★★☆
2009	75.9	47 of 176	73.3%	★★★★☆
2008	74.7	47 of 176	73.3%	★★★★☆
2007	76.9	33 of 176	81.3%	★★★★☆

Female

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2025	87.6	13 of 104	87.5%	★★★★☆
2024	89.7	10 of 102	90.2%	★★★★★
2023	90.6	8 of 103	92.2%	★★★★★
2022	77.0	30 of 106	71.7%	★★★★☆
2021	83.1	31 of 189	83.6%	★★★★☆

Male

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2025	85.1	19 of 111	82.9%	★★★★☆
2024	70.2	36 of 100	64.0%	★★★☆☆
2021	84.5	29 of 182	84.1%	★★★★☆

Special Education

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2021	78.7	33 of 175	81.1%	★★★★☆

White

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2025	75.8	27 of 116	76.7%	★★★★☆
2024	71.1	30 of 116	74.1%	★★★★☆
2023	85.3	13 of 116	88.8%	★★★★☆
2022	46.3	68 of 117	41.9%	★★☆☆☆
2021	77.8	30 of 155	80.6%	★★★★☆
2019	70.1	39 of 113	65.5%	★★★☆☆
2018	67.7	40 of 105	61.9%	★★★☆☆

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 (2025)88th percentile~ school

Male (2025)83rd percentile-6 vs school

Special Education (2021)81st percentile-3 vs school

White (2025)77th percentile-12 vs school

By subject vs Connecticut (2024-2025) ?

English Language Arts86%+28 vs state

Science73%+25 vs state

Math49%+18 vs state

★

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Schools Near Haddam-Killingworth High School

School	Students/Teachers	Ranking (2025)	Ranking (2024)	NGSS Science (2025)	SAT English Language Arts (2025)	SAT Math (2025)	Per Pupil Expenditures (2025)
Haddam-Killingworth High School	Public	9-12	95 Little City Road	Higganum	06441	Lower Connecticut River Valley Planning Region	Regional School District 17	No	No	No	No	(860) 345-8541	466	49	9.5	13.7%	409 (87.8%)	6 (1.3%)	23 (4.9%)	10 (2.1%)	1 (0.2%)	0 (0.0%)	16 (3.4%)	88.4	16^th of 141 public high schools	88.7%	85.9	18^th of 145 public high schools	87.6%	2	72.8	85.6	48.8	$30,768
Coginchaug Regional High School	Public	9-12	135 Pickett Ln.	Durham	06422	Lower Connecticut River Valley Planning Region	Regional School District 13	No	No	No	Yes	(860) 349-7215	356	40	8.8	15.7%	298 (83.7%)	4 (1.1%)	37 (10.4%)	7 (2.0%)	0 (0.0%)	0 (0.0%)	10 (2.8%)							(n/a)				$33,510
Nathan Hale-Ray High School	Public	9-12	15 School Drive	Moodus	06469	Lower Connecticut River Valley Planning Region	East Haddam School District	No	No	No	Yes	(860) 873-5065	262	33	7.9	29.4%	228 (87.0%)	0 (0.0%)	24 (9.2%)	4 (1.5%)	1 (0.4%)	0 (0.0%)	4 (1.5%)	60.2	56^th of 141 public high schools	60.3%	61.9	57^th of 145 public high schools	60.7%	1		65.5	32.8	$29,429
Whiting Forensic Hospital	Public	9-12	70 O'Brien Drive	Middletown	06457	Lower Connecticut River Valley Planning Region	Department of Mental Health and Addiction Services	No	(n/a)	No	(n/a)	(860) 262-7175	0	1	.0		0 ()	0 ()	0 ()	0 ()	0 ()	0 ()	0 ()							(n/a)
Vinal Technical High School	Public	9-12	60 Daniels St.	Middletown	06457	Lower Connecticut River Valley Planning Region	Connecticut Technical Education and Career System	No	No	No	No	(860) 344-7100	522	49	10.6	35.8%	333 (63.8%)	34 (6.5%)	104 (19.9%)	4 (0.8%)	0 (0.0%)	0 (0.0%)	43 (8.2%)	12.9	123^rd of 141 public high schools	12.8%	8.6	133^rd of 145 public high schools	8.3%	10	19.0		9.4	$33,758
East Hampton High School	Public	9-12	15 North Maple St.	East Hampton	06424	Lower Connecticut River Valley Planning Region	East Hampton School District	No	No	No	No	(860) 365-4030	488	43	11.2	21.7%	425 (87.1%)	8 (1.6%)	33 (6.8%)	4 (0.8%)	0 (0.0%)	0 (0.0%)	18 (3.7%)	80.3	30^th of 141 public high schools	78.7%				(n/a)	76.7	81.2	35.0	$23,232
Portland High School	Public	9-12	95 High Street	Portland	06480	Lower Connecticut River Valley Planning Region	Portland School District	No	No	No	No	(860) 342-1720	323	31	10.5	31.6%	234 (72.4%)	22 (6.8%)	48 (14.9%)	6 (1.9%)	0 (0.0%)	0 (0.0%)	12 (3.7%)	62.9	53^rd of 141 public high schools	62.4%	61.5	58^th of 145 public high schools	60.0%	5	51.9	67.5		$24,910
Valley Regional High School	Public	9-12	256 Kelsey Hill Rd.	Deep River	06417	Lower Connecticut River Valley Planning Region	Regional School District 04	No	No	No	Yes	(860) 526-5328	429	46	9.3	27.3%	351 (81.8%)	5 (1.2%)	47 (11.0%)	6 (1.4%)	0 (0.0%)	0 (0.0%)	15 (3.5%)	70.7	45^th of 141 public high schools	68.1%	56.9	64^th of 145 public high schools	55.9%	19	59.2	73.1	35.6	$31,338
Middletown High School	Public	9-12	200 LaRosa Lane	Middletown	06457	Lower Connecticut River Valley Planning Region	Middletown School District	No	No	No	No	(860) 704-4500	1,193	101	11.7	51.2%	453 (38.0%)	276 (23.1%)	279 (23.4%)	64 (5.4%)	3 (0.3%)	6 (0.5%)	110 (9.2%)	23.1	101^st of 141 public high schools	28.4%	26.7	101^st of 145 public high schools	30.3%		28.4	45.1	15.5	$26,430
The Morgan School	Public	9-12	71 Killingworth Tpke.	Clinton	06413	Lower Connecticut River Valley Planning Region	Clinton School District	No	No	No	No	(860) 664-6504	473	49	9.6	40.0%	322 (68.1%)	5 (1.1%)	118 (24.9%)	18 (3.8%)	0 (0.0%)	0 (0.0%)	9 (1.9%)	64.5	50^th of 141 public high schools	64.5%	66.2	51^st of 145 public high schools	64.8%	1	59.7	68.0	30.5	$26,789

Frequently Asked Questions about Haddam-Killingworth High School

How many students attend Haddam-Killingworth High School?

In the 2024-25 school year, 466 students attended Haddam-Killingworth High School.

What district is Haddam-Killingworth High School in?

Regional School District 17

What schools feed into Haddam-Killingworth High School?

Haddam-Killingworth High School is fed by the following schools:

Elementary : Burr District Elementary School
Elementary : Haddam-Killingworth Intermediate School
Elementary : Killingworth Elementary School
Middle : Haddam-Killingworth Middle School

What is the racial makeup of Haddam-Killingworth High School?

Students at Haddam-Killingworth High School are 88% White, 5% Hispanic, 3% Two or more races, 2% Asian, 1% African American.

Is Haddam-Killingworth High School a good school?

Haddam-Killingworth High School ranks 16^th of 141 Connecticut high schools. SchoolDigger rates this school 4 stars out of 5.

Rate Haddam-Killingworth High School!

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CTConnecticut High School Rankings

CTConnecticut District Rankings

Schools in Higganum, CT

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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.

School													Students/Teachers											Ranking (2025)				Ranking (2024)				NGSS Science (2025)	SAT English Language Arts (2025)	SAT Math (2025)	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	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	SchoolDigger Rating (2025)	Average Standard Score (2024)	Statewide Rank (2024)	State Percentile (2024)	Rank Change from Previous Year	NGSS Science 11th Grade	SAT English Language Arts 11th Grade	SAT Math 11th Grade	Total
Haddam-Killingworth High School	Public	9-12	95 Little City Road	Higganum	06441	Lower Connecticut River Valley Planning Region	Regional School District 17	No	No	No	No	(860) 345-8541	466	49	9.5	13.7%	409 (87.8%)	6 (1.3%)	23 (4.9%)	10 (2.1%)	1 (0.2%)	0 (0.0%)	16 (3.4%)	88.4	16^th of 141 public high schools	88.7%		85.9	18^th of 145 public high schools	87.6%	2	72.8	85.6	48.8	$30,768
Coginchaug Regional High School	Public	9-12	135 Pickett Ln.	Durham	06422	Lower Connecticut River Valley Planning Region	Regional School District 13	No	No	No	Yes	(860) 349-7215	356	40	8.8	15.7%	298 (83.7%)	4 (1.1%)	37 (10.4%)	7 (2.0%)	0 (0.0%)	0 (0.0%)	10 (2.8%)								(n/a)				$33,510
Nathan Hale-Ray High School	Public	9-12	15 School Drive	Moodus	06469	Lower Connecticut River Valley Planning Region	East Haddam School District	No	No	No	Yes	(860) 873-5065	262	33	7.9	29.4%	228 (87.0%)	0 (0.0%)	24 (9.2%)	4 (1.5%)	1 (0.4%)	0 (0.0%)	4 (1.5%)	60.2	56^th of 141 public high schools	60.3%		61.9	57^th of 145 public high schools	60.7%	1		65.5	32.8	$29,429
Whiting Forensic Hospital	Public	9-12	70 O'Brien Drive	Middletown	06457	Lower Connecticut River Valley Planning Region	Department of Mental Health and Addiction Services	No	(n/a)	No	(n/a)	(860) 262-7175	0	1	.0		0 ()	0 ()	0 ()	0 ()	0 ()	0 ()	0 ()								(n/a)
Vinal Technical High School	Public	9-12	60 Daniels St.	Middletown	06457	Lower Connecticut River Valley Planning Region	Connecticut Technical Education and Career System	No	No	No	No	(860) 344-7100	522	49	10.6	35.8%	333 (63.8%)	34 (6.5%)	104 (19.9%)	4 (0.8%)	0 (0.0%)	0 (0.0%)	43 (8.2%)	12.9	123^rd of 141 public high schools	12.8%		8.6	133^rd of 145 public high schools	8.3%	10	19.0		9.4	$33,758
East Hampton High School	Public	9-12	15 North Maple St.	East Hampton	06424	Lower Connecticut River Valley Planning Region	East Hampton School District	No	No	No	No	(860) 365-4030	488	43	11.2	21.7%	425 (87.1%)	8 (1.6%)	33 (6.8%)	4 (0.8%)	0 (0.0%)	0 (0.0%)	18 (3.7%)	80.3	30^th of 141 public high schools	78.7%					(n/a)	76.7	81.2	35.0	$23,232
Portland High School	Public	9-12	95 High Street	Portland	06480	Lower Connecticut River Valley Planning Region	Portland School District	No	No	No	No	(860) 342-1720	323	31	10.5	31.6%	234 (72.4%)	22 (6.8%)	48 (14.9%)	6 (1.9%)	0 (0.0%)	0 (0.0%)	12 (3.7%)	62.9	53^rd of 141 public high schools	62.4%		61.5	58^th of 145 public high schools	60.0%	5	51.9	67.5		$24,910
Valley Regional High School	Public	9-12	256 Kelsey Hill Rd.	Deep River	06417	Lower Connecticut River Valley Planning Region	Regional School District 04	No	No	No	Yes	(860) 526-5328	429	46	9.3	27.3%	351 (81.8%)	5 (1.2%)	47 (11.0%)	6 (1.4%)	0 (0.0%)	0 (0.0%)	15 (3.5%)	70.7	45^th of 141 public high schools	68.1%		56.9	64^th of 145 public high schools	55.9%	19	59.2	73.1	35.6	$31,338
Middletown High School	Public	9-12	200 LaRosa Lane	Middletown	06457	Lower Connecticut River Valley Planning Region	Middletown School District	No	No	No	No	(860) 704-4500	1,193	101	11.7	51.2%	453 (38.0%)	276 (23.1%)	279 (23.4%)	64 (5.4%)	3 (0.3%)	6 (0.5%)	110 (9.2%)	23.1	101^st of 141 public high schools	28.4%		26.7	101^st of 145 public high schools	30.3%		28.4	45.1	15.5	$26,430
The Morgan School	Public	9-12	71 Killingworth Tpke.	Clinton	06413	Lower Connecticut River Valley Planning Region	Clinton School District	No	No	No	No	(860) 664-6504	473	49	9.6	40.0%	322 (68.1%)	5 (1.1%)	118 (24.9%)	18 (3.8%)	0 (0.0%)	0 (0.0%)	9 (1.9%)	64.5	50^th of 141 public high schools	64.5%		66.2	51^st of 145 public high schools	64.8%	1	59.7	68.0	30.5	$26,789