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Haddam-Killingworth Intermediate School

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

Haddam-Killingworth Intermediate School ranks 130 th of 491 Connecticut elementary schools. SchoolDigger rates this school 4 stars out of 5.

Public Grades 4-5

130^th

SchoolDigger Rank ?

of 491 Connecticut Elementary Schools

Better than 74% of Connecticut elementary schools

Summary

Haddam-Killingworth Intermediate School is a small elementary school in Killingworth, CT, serving 280 students in grades 4–5 as part of Regional School District 17, which ranks in the top third of Connecticut districts. The school itself currently ranks in the 74th percentile of Connecticut elementary schools with a 4-star rating, and has been consistently above average over the past six years, with percentile scores ranging from 69 to 80.

The school's biggest academic strengths are in 4th grade, where 76.8% of students scored proficient in math (versus 52.1% statewide) and 70.4% scored proficient in ELA (versus 50.9% statewide). However, 5th-grade math tells a different story: only 54.7% of 5th graders were proficient, compared to 70.4% at Deep River Elementary and 83.3% at Chester Elementary. This 22-point drop from 4th to 5th grade math is the school's most striking academic vulnerability. Overall, HK Intermediate ranks ahead of nearby Essex Elementary (69th percentile), Melissa Jones School (57th), and Lewin G. Joel Junior School (62nd), but trails Dr. Robert H. Brown Elementary (96th percentile), Chester (81st), and Deep River (77th).

On the positive side, the school has a low chronic absenteeism rate of 5.5%, far below the state average of 16.4%, and serves a relatively economically advantaged population, with 18.6% of students eligible for free/reduced lunch compared to 32.3% at Deep River and 38.5% at Lewin G. Joel. The student-teacher ratio of 12.7 is higher than most nearby schools, including Killingworth Elementary (11.1) and Guilford Lakes School (11.9). Subgroup results are more mixed than the overall rank suggests, with female students at the 65th percentile and male students at the 54th percentile statewide. Overall, HK Intermediate is a solid, above-average school with strong ELA and 4th-grade math, but families should keep an eye on how the school addresses the 5th-grade math slide.

280

Students ?

12.7

Student/teacher ratio ?

$20,736

Per pupil spending ?

18.6%

Free/discounted lunch ?

451 Route 81
Killingworth, CT 06419

(860) 663-1241

District: Regional School District 17

Students who attend Haddam-Killingworth Intermediate School usually attend:

Middle:	Haddam-Killingworth Middle School
High:	Haddam-Killingworth High School

Racial breakdown:

White:

89.3%

Hispanic:

4.6%

Two or more races:

3.6%

See top rated Connecticut elementary schools

Compare Haddam-Killingworth Intermediate School to nearby elementary schools!

At a glance

▼ Ranking trend: Declining — 80th percentile in 2021 → 74th in 2026

Strengths

✓Test scores above the Connecticut average (69% vs 51% meeting standards)

✓Above the Connecticut median (74th percentile)

Worth a look

!Ranking has slipped — down 6 percentile points since 2021

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

Students meeting standards (2025-2026) ?

This school69%

District avg69%

Connecticut avg51%

130^th of 491

Connecticut public elementary schools ?

Top 26%▼ down 7 pts since 2021

From top 20% (2021) to top 26% (2026)

See the entire ranking list of Connecticut Elementary Schools →

★★★★★

SchoolDigger rating ?

44^th of 153Regional 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
2026	77.3	130 of 491	73.5%	★★★★☆
2025	73.4	154 of 493	68.8%	★★★☆☆
2024	76.5	135 of 497	72.8%	★★★★☆
2023	82.7	98 of 491	80.0%	★★★★☆
2022	81.6	98 of 490	80.0%	★★★★☆
2021	82.5	106 of 538	80.3%	★★★★☆

Female

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2026	74.1	79 of 225	64.9%	★★★☆☆
2025	72.1	81 of 232	65.1%	★★★☆☆
2024	76.0	72 of 237	69.6%	★★★★☆
2023	74.1	82 of 230	64.3%	★★★☆☆
2022	69.1	97 of 234	58.5%	★★★☆☆
2021	76.7	110 of 455	75.8%	★★★★☆

Male

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2026	65.5	107 of 232	53.9%	★★★☆☆
2025	56.4	127 of 239	46.9%	★★☆☆☆
2024	57.2	123 of 233	47.2%	★★☆☆☆
2023	77.7	61 of 231	73.6%	★★★★☆
2022	79.3	56 of 232	75.9%	★★★★☆
2021	80.9	89 of 445	80.0%	★★★★☆

Special Education

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2021	84.5	36 of 371	90.3%	★★★★★

White

Year	Avg score	Statewide rank	Connecticut percentile	Rating
2026	48.8	160 of 246	35.0%	★★☆☆☆
2025	37.6	183 of 248	26.2%	★☆☆☆☆
2024	44.5	171 of 250	31.6%	★★☆☆☆
2023	60.2	121 of 262	53.8%	★★★☆☆
2022	57.2	126 of 252	50.0%	★★★☆☆
2021	59.7	137 of 327	58.1%	★★★☆☆

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)

Special Education (2021)90th percentile+10 vs school

Female (2026)65th percentile-9 vs school

Male (2026)54th percentile-20 vs school

White (2026)35th percentile-39 vs school

By subject vs Connecticut (2025-2026) ?

English Language Arts71%+19 vs state

Science69%+16 vs state

Mathematics66%+17 vs state

★

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Schools Near Haddam-Killingworth Intermediate School

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Ranking:

E Elementary M Middle H High A Alternative P Private

School	Students/Teachers	Ranking (2026)	Ranking (2025)	NGSS Science (2026)	SBAC English Language Arts (2026)	SBAC Mathematics (2026)	Per Pupil Expenditures (2025)
Haddam-Killingworth Intermediate School	Public	4-5	451 Route 81	Killingworth	06419	Lower Connecticut River Valley Planning Region	Regional School District 17	No	No	No	No	(860) 663-1241	280	22	12.7	18.6%	250 (89.3%)	4 (1.4%)	13 (4.6%)	2 (0.7%)	1 (0.4%)	0 (0.0%)	10 (3.6%)	77.3	130^th of 491 public elementary schools	73.5%	73.4	154^th of 493 public elementary schools	68.8%	24	68.8		70.4	72.7			76.8	54.7		$20,736
Killingworth Elementary School	Public	PK, KG-3	340 Route 81	Higganum	06419	Lower Connecticut River Valley Planning Region	Regional School District 17	No	No	No	No	(860) 663-1121	257	23	11.1	15.6%	226 (87.9%)	1 (0.4%)	15 (5.8%)	2 (0.8%)	0 (0.0%)	0 (0.0%)	13 (5.1%)							(n/a)		63.0				57.4				$27,528
Dr. Robert H. Brown Elementary School	Public	PK, KG-5	980 Durham Rd.	Madison	06443	South Central Connecticut Planning Region	Madison School District	No	No	No	Yes	(203) 245-6400	361	33	11.0	4.2%	304 (84.2%)	3 (0.8%)	16 (4.4%)	12 (3.3%)	0 (0.0%)	1 (0.3%)	24 (6.6%)	92.1	19^th of 491 public elementary schools	96.1%	88.9	41^st of 493 public elementary schools	91.7%	22	86.0	75.7	85.5	84.9		85.1	85.5			$24,005
Burr District Elementary School	Public	K-3	792 Killingworth Road	Higganum	06441	Lower Connecticut River Valley Planning Region	Regional School District 17	No	No	No	No	(860) 345-4584	278	26	10.9	20.1%	262 (94.2%)	2 (0.7%)	10 (3.6%)	2 (0.7%)	0 (0.0%)	0 (0.0%)	2 (0.7%)							(n/a)		64.0				66.7				$26,619
Chester Elementary School	Public	PK, KG-6	23 Ridge Rd.	Chester	06412	Lower Connecticut River Valley Planning Region	Chester School District	No	No	No	Yes	(860) 526-5797	198	0	9.6	28.3%	173 (87.4%)	0 (0.0%)	17 (8.6%)	2 (1.0%)	0 (0.0%)	0 (0.0%)	6 (3.0%)	82.4	91^st of 491 public elementary schools	81.5%	81.7	91^st of 493 public elementary schools	81.5%				66.7	70.8		70.6		83.3	74.3	$30,591
Lewin G. Joel Junior School	Public	PK, KG-4	137A Glenwood Rd.	Clinton	06413	Lower Connecticut River Valley Planning Region	Clinton School District	No	No	No	Yes	(860) 664-6501	532	53	10.0	38.5%	364 (68.4%)	4 (0.8%)	133 (25.0%)	13 (2.4%)	0 (0.0%)	0 (0.0%)	18 (3.4%)	67.8	189^th of 491 public elementary schools	61.5%	59.4	217^th of 493 public elementary schools	56.0%	28		56.0	64.2			59.3	69.8			$21,758
Deep River Elementary School	Public	PK, KG-6	12 River St.	Deep River	06417	Lower Connecticut River Valley Planning Region	Deep River School District	No	No	No	Yes	(860) 526-5319	189	0	9.8	32.3%	165 (87.3%)	1 (0.5%)	19 (10.1%)	0 (0.0%)	0 (0.0%)	2 (1.1%)	2 (1.1%)	79.3	113^th of 491 public elementary schools	77.0%	77.2	129^th of 493 public elementary schools	73.8%	16	77.8	69.0	56.3	70.4	74.1	72.4	75.0	70.4		$32,856
Neck River Elementary School	Public	PK, KG-5	180 Mungertown Road	Madison	06443	South Central Connecticut Planning Region	Madison School District	No	(n/a)	(n/a)	(n/a)	(203) 245-6300	0																	(n/a)	85.7	84.9	75.7	82.4		84.9	77.3	82.4
Guilford Lakes School	Public	PK, KG-4	40 Maupas Rd.	Guilford	06437	South Central Connecticut Planning Region	Guilford School District	No	No	No	No	(203) 453-5201	369	31	11.9	13.3%	259 (70.2%)	2 (0.5%)	56 (15.2%)	15 (4.1%)	0 (0.0%)	0 (0.0%)	37 (10.0%)	76.8	135^th of 491 public elementary schools	72.5%	76.7	133^rd of 493 public elementary schools	73.0%	2		74.1	62.0			75.9	66.2			$22,595
Essex Elementary School	Public	PK, KG-6	108 Main St.	Centerbrook	06409	Lower Connecticut River Valley Planning Region	Essex School District	No	No	No	Yes	(860) 767-8215	307	0	10.3	21.2%	254 (82.7%)	3 (1.0%)	37 (12.1%)	1 (0.3%)	0 (0.0%)	1 (0.3%)	11 (3.6%)	74.4	151^st of 491 public elementary schools	69.2%	78.4	121^st of 493 public elementary schools	75.5%	30			58.3	64.5	73.8	73.0				$27,228

Frequently Asked Questions about Haddam-Killingworth Intermediate School

How many students attend Haddam-Killingworth Intermediate School?

In the 2024-25 school year, 280 students attended Haddam-Killingworth Intermediate School.

What district is Haddam-Killingworth Intermediate School in?

Regional School District 17

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

Students at Haddam-Killingworth Intermediate School are 89% White, 5% Hispanic, 4% Two or more races, 1% African American.

What schools do graduates of Haddam-Killingworth Intermediate School attend?

Students who attend Haddam-Killingworth Intermediate School usually go on to attend:

Middle : Haddam-Killingworth Middle School
High : Haddam-Killingworth High School

Is Haddam-Killingworth Intermediate School a good school?

Haddam-Killingworth Intermediate School ranks 130^th of 491 Connecticut elementary schools. SchoolDigger rates this school 4 stars out of 5.

Rate Haddam-Killingworth Intermediate School!

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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.

School													Students/Teachers											Ranking (2026)				Ranking (2025)				NGSS Science (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 5th Grade	SBAC English Language Arts 3rd Grade	SBAC English Language Arts 4th Grade	SBAC English Language Arts 5th Grade	SBAC English Language Arts 6th Grade	SBAC Mathematics 3rd Grade	SBAC Mathematics 4th Grade	SBAC Mathematics 5th Grade	SBAC Mathematics 6th Grade	Total
Haddam-Killingworth Intermediate School	Public	4-5	451 Route 81	Killingworth	06419	Lower Connecticut River Valley Planning Region	Regional School District 17	No	No	No	No	(860) 663-1241	280	22	12.7	18.6%	250 (89.3%)	4 (1.4%)	13 (4.6%)	2 (0.7%)	1 (0.4%)	0 (0.0%)	10 (3.6%)	77.3	130^th of 491 public elementary schools	73.5%		73.4	154^th of 493 public elementary schools	68.8%	24	68.8		70.4	72.7			76.8	54.7		$20,736
Killingworth Elementary School	Public	PK, KG-3	340 Route 81	Higganum	06419	Lower Connecticut River Valley Planning Region	Regional School District 17	No	No	No	No	(860) 663-1121	257	23	11.1	15.6%	226 (87.9%)	1 (0.4%)	15 (5.8%)	2 (0.8%)	0 (0.0%)	0 (0.0%)	13 (5.1%)								(n/a)		63.0				57.4				$27,528
Dr. Robert H. Brown Elementary School	Public	PK, KG-5	980 Durham Rd.	Madison	06443	South Central Connecticut Planning Region	Madison School District	No	No	No	Yes	(203) 245-6400	361	33	11.0	4.2%	304 (84.2%)	3 (0.8%)	16 (4.4%)	12 (3.3%)	0 (0.0%)	1 (0.3%)	24 (6.6%)	92.1	19^th of 491 public elementary schools	96.1%		88.9	41^st of 493 public elementary schools	91.7%	22	86.0	75.7	85.5	84.9		85.1	85.5			$24,005
Burr District Elementary School	Public	K-3	792 Killingworth Road	Higganum	06441	Lower Connecticut River Valley Planning Region	Regional School District 17	No	No	No	No	(860) 345-4584	278	26	10.9	20.1%	262 (94.2%)	2 (0.7%)	10 (3.6%)	2 (0.7%)	0 (0.0%)	0 (0.0%)	2 (0.7%)								(n/a)		64.0				66.7				$26,619
Chester Elementary School	Public	PK, KG-6	23 Ridge Rd.	Chester	06412	Lower Connecticut River Valley Planning Region	Chester School District	No	No	No	Yes	(860) 526-5797	198	0	9.6	28.3%	173 (87.4%)	0 (0.0%)	17 (8.6%)	2 (1.0%)	0 (0.0%)	0 (0.0%)	6 (3.0%)	82.4	91^st of 491 public elementary schools	81.5%		81.7	91^st of 493 public elementary schools	81.5%				66.7	70.8		70.6		83.3	74.3	$30,591
Lewin G. Joel Junior School	Public	PK, KG-4	137A Glenwood Rd.	Clinton	06413	Lower Connecticut River Valley Planning Region	Clinton School District	No	No	No	Yes	(860) 664-6501	532	53	10.0	38.5%	364 (68.4%)	4 (0.8%)	133 (25.0%)	13 (2.4%)	0 (0.0%)	0 (0.0%)	18 (3.4%)	67.8	189^th of 491 public elementary schools	61.5%		59.4	217^th of 493 public elementary schools	56.0%	28		56.0	64.2			59.3	69.8			$21,758
Deep River Elementary School	Public	PK, KG-6	12 River St.	Deep River	06417	Lower Connecticut River Valley Planning Region	Deep River School District	No	No	No	Yes	(860) 526-5319	189	0	9.8	32.3%	165 (87.3%)	1 (0.5%)	19 (10.1%)	0 (0.0%)	0 (0.0%)	2 (1.1%)	2 (1.1%)	79.3	113^th of 491 public elementary schools	77.0%		77.2	129^th of 493 public elementary schools	73.8%	16	77.8	69.0	56.3	70.4	74.1	72.4	75.0	70.4		$32,856
Neck River Elementary School	Public	PK, KG-5	180 Mungertown Road	Madison	06443	South Central Connecticut Planning Region	Madison School District	No	(n/a)	(n/a)	(n/a)	(203) 245-6300	0																		(n/a)	85.7	84.9	75.7	82.4		84.9	77.3	82.4
Guilford Lakes School	Public	PK, KG-4	40 Maupas Rd.	Guilford	06437	South Central Connecticut Planning Region	Guilford School District	No	No	No	No	(203) 453-5201	369	31	11.9	13.3%	259 (70.2%)	2 (0.5%)	56 (15.2%)	15 (4.1%)	0 (0.0%)	0 (0.0%)	37 (10.0%)	76.8	135^th of 491 public elementary schools	72.5%		76.7	133^rd of 493 public elementary schools	73.0%	2		74.1	62.0			75.9	66.2			$22,595
Essex Elementary School	Public	PK, KG-6	108 Main St.	Centerbrook	06409	Lower Connecticut River Valley Planning Region	Essex School District	No	No	No	Yes	(860) 767-8215	307	0	10.3	21.2%	254 (82.7%)	3 (1.0%)	37 (12.1%)	1 (0.3%)	0 (0.0%)	1 (0.3%)	11 (3.6%)	74.4	151^st of 491 public elementary schools	69.2%		78.4	121^st of 493 public elementary schools	75.5%	30			58.3	64.5	73.8	73.0				$27,228