📊 Directory: NCES CCD 2024–2025·📈 Ratings: EDFacts 2021–22·🔄 Updated: August 2026·Editorial standards
📍 Hadlyme, CT · Lower Connecticut River Valley Planning Region

School District for
Zip Code 06439 — Hadlyme, CT

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ZIP 06439 is served by Regional School District 18, rated 10/10 — 94th percentile in Connecticut.Ratings are percentile ranks within a single state, so they are not comparable across states.
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Regional School District 18 · Grades Pre-K – 12th

10
out of 10 Rating Excellent
State reading & math tests (EDFacts 2021–22) · 94th percentile in CT
▼ Declining — down 5 points since 2018 — part of a nationwide post-pandemic dip in test scores, not unique to this district
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Can I rent in Hadlyme and still attend schools in this district?▼
Yes. School district assignment is based on your home address, not whether you own or rent. As long as your rental address falls within the Regional School District 18 boundaries, your children are eligible to attend district schools.
How does the Regional School District 18 rating compare to other districts in CT?▼
The Regional School District 18 has an overall rating of 10/10 (Excellent) based on students’ reading and math proficiency on state assessments. Use our best districts in CT page to compare with other districts statewide.
School District · Hadlyme, CT
Regional School District 18
📍 Lower Connecticut River Valley Planning Region, CT · Zip Code 06439
10/10
Rating
1,288
Students
5
Schools
Pre-K – 12th
Grade Span
Great About this district: Public school district serving Hadlyme, CT
District Contact & InformationSource: NCES 2024–2025
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Grades Served
Pre-K – 12th
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District Phone
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District Website
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District Office
4 Davis Road West, Old Lyme, CT 06371
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District Type
Public School District
Assigned Schools for Zip 06439
Based on NCES district data · Always verify directly with the district
Schools Nearest Zip Code 06439NCES 2024–2025
  • Lyme Consolidated School — 3.2 mi · Grades K–5 · 226 students
  • Lyme-Old Lyme Middle School — 7.6 mi · Grades 6–8 · 271 students
  • Center School — 7.7 mi · Grades PK–PK · 80 students
  • Lyme-Old Lyme High School — 7.7 mi · Grades 9–12 · 367 students
  • Mile Creek School — 10.2 mi · Grades K–5 · 334 students
Distance is measured from the center of zip code 06439 to each school, using Census ZCTA centroids and NCES school coordinates. This is a proximity list, not an attendance-zone assignment — the school your child is assigned to depends on your exact address, so confirm with the district.
District Statisticsvs. National Average
MetricRegional School District 18National AverageComparison
Student Enrollment1,2883,544↓ Smaller than avg
Number of Schools57Varies by district
Per-Pupil Spending$29,149/yr$17,619/yr↑ 65% above avg
District TypePublic School DistrictPublic District—
Overall Rating10/10 — Excellent—Above average
Per-pupil figure: US Census Bureau, Annual Survey of School System Finances, FY2024 — current spending per pupil, which excludes capital outlay and debt service. National averages: NCES Common Core of Data 2024–25, mean of the 13,327 regular operating districts (the median district enrolls about 1,100 students).
🌏 District Map Boundary from U.S. Census TIGER
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Always verify before deciding: Contact Regional School District 18 directly to confirm your exact school assignment. Boundaries change annually and open enrollment may alter your options. Nearby zip codes are served by East Haddam School District and Essex School District — if your address is near a district line, your assignment may differ from this zip-level estimate.
How Regional School District 18 Compares NearbyState percentile · EDFacts 2021–22
DistrictRatingPercentileStudents
Regional School District 18 (this district)10/1094th1,288
East Haddam School District6/1050th990
Essex School District10/1091st301
Chester School District10/1092nd222
🔢 Show the math behind this rating
Reading proficiency: 78% · Math proficiency: 70% · Combined average: 74%
Ranked against 151 rated districts in CT → 94th percentile → 10/10.
Source: U.S. Dept. of Education EDFacts, 2021–22 school year. Full methodology →
Frequently Asked Questions
What grades does Regional School District 18 serve?▼
Regional School District 18 serves students from Pre-K – 12th. The district operates schools at multiple levels to serve all students in zip code 06439. Contact the district directly to confirm grade configurations at specific schools.
How do I contact Regional School District 18?▼
You can reach Regional School District 18 via phone: (860)434-7238 or website: www.region18.org. The district office can help with school assignment questions, enrollment, registration, and general inquiries about programs and services in zip code 06439.
Is Regional School District 18 a public school district?▼
Regional School District 18 is classified as a public school district. Public school districts are funded by local, state, and federal tax dollars and are open to all students residing within district boundaries. Enrollment is generally free of charge, and students are assigned to schools based on home address. To confirm eligibility and enrollment requirements for zip code 06439, contact Regional School District 18 directly.

About Regional School District 18

Regional School District 18 serves zip code 06439, covering Hadlyme, Connecticut with grades Pre-K – 12th. Whether you’re researching a move, evaluating a home purchase, or preparing to enroll a child, the sections below give you a complete picture of this district’s resources, size, and what its rating means for your family.

Understanding the 10/10 Rating

SchoolDistrictFinder rates Regional School District 18 10 out of 10 — top-tier among Connecticut public school districts. Our ratings are based on state assessment results — the share of students scoring proficient or above in reading and math, as reported in the U.S. Department of Education’s EDFacts collection (2021–22 school year). We average each district’s reading and math proficiency, then rank it against other districts in the same state to produce a 1–10 score. Because Connecticut is compared only against itself, the rating reflects how this district performs relative to its in-state peers.

Regional School District 18 ranks among the highest-performing public school districts in Connecticut on state assessments, with reading and math proficiency rates in roughly the top 10–20% statewide. Homes in and around zip code 06439 often carry a measurable premium relative to neighboring areas served by lower-rated districts. Families moving here for academic strength will find a district whose students test well above the state norm. Even within top-rated districts, individual school performance varies — confirm your specific school assignments directly with the district.

Enrollment for Families in Zip Code 06439

Children in zip code 06439 are assigned to Regional School District 18 for public school enrollment, covering grades Pre-K – 12th. School assignments are address-specific — your elementary, middle, and high school placements depend on your exact street address within zip code 06439, not just your neighborhood. Two homes on opposite ends of the same zip code may be assigned to different schools within the same district.

To confirm your specific school assignments, contact Regional School District 18 at (860)434-7238 or visit www.region18.org. Typical enrollment documents include a signed lease or mortgage statement, birth certificate, state-required immunization documentation, and recent report cards or transcripts. If your child has an IEP or 504 plan, bring that documentation to enrollment — Connecticut districts are required to continue services within a reasonable period. Fall enrollment windows typically open in late winter or early spring; contact the district for exact dates and required steps.

School Districts and Home Values in Hadlyme

Research consistently shows that district assignment affects residential property values. Because Regional School District 18 serves zip code 06439, homes in and around zip code 06439 often carry a measurable premium over comparable properties in adjacent lower-rated districts. District boundaries are address-specific — verify the exact district assignment for any property you’re seriously considering rather than assuming based on the neighborhood. A single block can place two adjacent homes in different districts with different ratings and different annual property tax implications.

Use the property tax estimator on this page to calculate estimated annual tax obligations based on your target purchase price. In Connecticut, property taxes are a primary funding source for public schools — your tax payments directly support Regional School District 18 programs and staff. Understanding both district quality and the associated tax burden is essential financial due diligence before committing to any home in zip code 06439.

Data Sources and Accuracy

All district information on this page is sourced from the NCES Common Core of Data (CCD) 2024–2025, the U.S. Department of Education’s annual census of all public school districts — the same dataset used by researchers, journalists, and policymakers to analyze American public education. District boundaries, school assignments and phone numbers are updated annually when NCES publishes new data, typically in spring; per-pupil spending comes from the US Census Bureau's Annual Survey of School System Finances, released about two years after the fiscal year it covers. Always verify your specific school assignment and enrollment requirements directly with Regional School District 18 before making any housing or enrollment decision based on zip code 06439 data.

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District at a Glance
Overall Rating10/10
GradeGreat
Grades ServedPre-K – 12th
District TypePublic School District
Total Students1,288
Total Schools5
Per-Pupil Spending$29,149/yr
Phone(860)434-7238
Data SourceNCES 2024