School District · Connecticut
Regional School District 18
📍 Hadlyme, CT · Lower Connecticut River Valley Planning Region · NCES LEAID 0903540
District Contact & InformationSource: NCES CCD 2024–25
📚
Grades Served
Pre-K – 12th
📍
District Mailing Address
49 Lyme Street, Old Lyme, CT 06371
🌐
NCES District ID (LEAID)
0903540
🏛
District Type
Public School District
Zip Codes Served by Regional School District 183 zip codes
Frequently Asked Questions
What zip codes are in Regional School District 18?▼
Regional School District 18 serves 3 zip codes: 06371, 06376, 06439. Zip codes and district boundaries do not line up exactly, so confirm your exact address with the district office before you rely on an assignment.
How is Regional School District 18 rated?▼
Regional School District 18 has an overall rating of 10 out of 10 (Excellent), based on the share of students proficient in reading and math on state assessments (NCES EDFacts). That places it in the 95th percentile among Connecticut school districts. Ratings are percentile-ranked within Connecticut only and are not comparable across states.
How many students attend Regional School District 18?▼
The NCES Common Core of Data directory reports enrollment of 1,288 students across 5 schools for Regional School District 18.
What grades does Regional School District 18 serve?▼
Regional School District 18 is listed in the NCES directory as serving grades Pre-K – 12th.
How do I contact Regional School District 18?▼
You can reach Regional School District 18 by phone at (860)434-7238 or by mail at 49 Lyme Street, Old Lyme, CT 06371. Contact details come from the NCES district directory and are the best way to confirm which school your address is assigned to.
About Regional School District 18
Regional School District 18 is a public school district serving 3 zip codes in Connecticut, primarily in Lower Connecticut River Valley Planning Region. It carries an overall rating of 10/10 (Excellent), the 95th percentile among Connecticut districts. That rating reflects the share of students proficient in reading and math on state assessments (NCES EDFacts, 2021–22 for most districts with a 2017–18 fallback for the rest) and is ranked only against other Connecticut districts — scores are not comparable between states. Directory details on this page come from the NCES Common Core of Data, 2024–25.
District boundaries are address-specific and do not follow zip code lines exactly — a single zip code can
be split between two or more districts. Use the zip codes listed above as a starting point, then confirm your
assignment with the district office at (860)434-7238 before making a housing decision.