Excellent
#48 of 990 schools in CT
Top 5% in state
Lyme-old Lyme High School
High School · Regional School District 18
69 Lyme St., Old Lyme, CT 06371
Enrollment
392
Student-Teacher
9.8:1
Score
8.9
Grades
9th – 12th
Enrollment
392
Student-Teacher
9.8:1
Score
8.9
Grades
9th – 12th
Updated
2022-23
Updated 2022-23
How this school compares
In Old Lyme
#1 of 4
public schools
Connecticut high schools
#6 of 196
In district
#1 of 5
Regional School District 18
School environment
9.4 / 10
Exceptional
About Lyme-old Lyme High School
Lyme-old Lyme High School is a public high school in Old Lyme, CT, part of the Regional School District 18. The school serves approximately 392 students in grades 9th – 12th with a student-teacher ratio of 9.8:1. It holds a MySchoolScout rating of 8.9/10, placing it in the 95.3th percentile among CT schools — an above average rating overall.
Students demonstrate 70% proficiency in math and 84% in reading/language arts. The school scores particularly well in school environment (9.4/10). Located in a neighborhood with a median household income of $127,429, where 56% of adults hold a bachelor's degree or higher.
The school is situated in a fringe rural setting.
What's said publicly about Lyme-old Lyme High School
Synthesized from public, attributable sources. Updated May 2026. Reviewed for accuracy.
Sources (1)
What Parents Should Know
With a student-teacher ratio of 9.8:1, Lyme-old Lyme High School offers a notably low ratio compared to the national average. This typically means smaller class sizes and more opportunities for one-on-one interaction between students and teachers.
Located in a rural area, Lyme-old Lyme High School may involve longer commutes for some families. Rural schools often serve as community anchors and may have smaller class sizes, but parents should consider transportation logistics, after-school program availability, and access to specialized services.
Score Breakdown
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Lyme-old Lyme High School — Students at Lyme-old Lyme High School score 77% proficient, which is above what's typical for similar communities (expected: 69%).
Equity & Diversity
Shown separately, not included in overall scoreFree/Reduced Lunch
13.5%
Students qualifying for federal meal assistance
Test Scores CT EDFACTS (2021-22)
Based on 6 test records from CT state assessments. About our data
Proficiency Trend
↓ DecliningAverage proficiency (% at or above grade level) across Math & ELA over time.
* COVID-affected year — test participation was uneven nationwide. This data is weighted at 50% in the Growth score calculation.
Source: EdFacts (NCES) and state assessment data. Growth score: 7.1/10.
How Lyme-old Lyme High School Compares
See how Lyme-old Lyme High School performs across key quality dimensions compared to state benchmarks.
Funding & Resources
Performance Trends
Math proficiency has declined from 77% (2019) to 67% (2022). Reading/ELA proficiency has remained stable from 87% (2019) to 87% (2022).
Location
69 Lyme St., Old Lyme, CT 06371
Nearby Alternatives
Families considering Lyme-old Lyme High School may also want to explore other high schools in the area. East Lyme High School (rated 8.7/10, 6.8 miles away, in nearby East Lyme), with a very similar rating. Another option is Old Saybrook Senior High School (rated 7.9/10, 4.2 miles away, in nearby Old Saybrook), with a comparable rating. Additionally, Westbrook High School (rated 7.6/10, 6.8 miles away, in nearby Westbrook), a more accessible option. For more schools in Old Lyme, see our Old Lyme schools guide .
Nearby Schools
20 within 6.8 mi| School | Distance | Rating |
|---|---|---|
| Lyme-Old Lyme Middle School Old Lyme | 0.1 mi | 8.1 |
| Center School Old Lyme | 0.2 mi | 5.5 |
| THE CHILDREN'S TREE MONTESSORI SCHOOL Old Saybrook | 1.7 mi | 6.7 |
| Mile Creek School Old Lyme | 2.6 mi | 7.7 |
| Old Saybrook Middle School Old Saybrook | 3.1 mi | 6.9 |
| ST JOHN SCHOOL Old Saybrook | 3.3 mi | 4.6 |
| Kathleen E. Goodwin School Old Saybrook | 3.7 mi | 9.3 |
| Old Saybrook Senior High School Old Saybrook | 4.2 mi | 7.9 |
| Lyme Consolidated School Lyme | 6.6 mi | 7.9 |
| Essex Elementary School Centerbrook | 5.3 mi | 8.8 |
| Lillie B. Haynes School Niantic | 6.1 mi | 4.9 |
| East Lyme Middle School Niantic | 6.2 mi | 6.5 |
| Flanders School East Lyme | 6.6 mi | 7.9 |
| Daisy Ingraham School Westbrook | 6.4 mi | 5.5 |
| Niantic Center School Niantic | 6.3 mi | 4.5 |
| East Lyme High School East Lyme | 6.8 mi | 8.7 |
| Deep River Elementary School Deep River | 7.4 mi | 8.9 |
| Westbrook High School Westbrook | 6.8 mi | 7.6 |
| Westbrook Middle School Westbrook | 6.9 mi | 8.2 |
| THE LIGHT HOUSE VOC-ED CENTER Niantic | 6.8 mi | — |
Neighborhood Census ACS (2019-2023)
Census data for ZIP 06371 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$127,429
Median Home Value
$468,200
Median Rent
$1,891/mo
Population
9,855
College Educated
56.1%
Homeownership
88.5%
Avg Commute
26.8 min
Poverty Rate
2.3%
Median Age
51.6
Community Profile
The community surrounding Lyme-old Lyme High School has a median household income of $127,429. It is a well-educated community where 56% of adults hold a bachelor's degree or higher. The median home value in the area is $468,200, with a median rent of $1,891/month. The local poverty rate of 2.3% is relatively low. The average commute for residents is 27 minutes. Source: U.S. Census ACS 2022 5-Year Estimates.
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Center for Global Studies Norwalk, CT | 9.1 |
| The Morgan School Clinton, CT | 8.7 |
| Valley Regional High School Deep River, CT | 9.3 |
| Marine Science Magnet High School Groton, CT | 8.3 |
| THE CHESHIRE ACADEMY Cheshire, CT | 8.2 |
| Wamogo Regional High School Litchfield, CT | 8.2 |
Frequently Asked Questions
Common questions about Lyme-old Lyme High School
What grades does Lyme-old Lyme High School serve?
Lyme-old Lyme High School serves students in grades 9th through 12th.
How many students attend Lyme-old Lyme High School?
Lyme-old Lyme High School has an enrollment of approximately 392 students.
What is the student-teacher ratio at Lyme-old Lyme High School?
The student-teacher ratio at Lyme-old Lyme High School is 9.8:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does Lyme-old Lyme High School rank in CT?
Lyme-old Lyme High School is ranked #48 out of 990 schools in CT.
What is Lyme-old Lyme High School's MySchoolScout rating?
Lyme-old Lyme High School has a composite rating of 8.9 out of 10 on MySchoolScout. This score combines academic performance, student growth, and school environment into a single score. Equity data is shown separately for context.
What are the test scores at Lyme-old Lyme High School?
Based on the most recent state assessment data, Lyme-old Lyme High School has 70.3% math proficiency and 83.7% reading/ELA proficiency.
Is Lyme-old Lyme High School a charter school?
No, Lyme-old Lyme High School is not a charter school. It is a traditional public school operated by the local school district.
Is Lyme-old Lyme High School a Title I school?
No, Lyme-old Lyme High School is not currently a Title I school.
What does the Free & Reduced Lunch percentage mean for Lyme-old Lyme High School?
13.5% of students at Lyme-old Lyme High School qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.
Explore More Schools
Neighborhood Context
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Quick Facts NCES CCD (SY 2022-23)
- Grades
- 9th – 12th
- Enrollment
- 392
- Student-Teacher Ratio
- 9.8:1
- Teachers (FTE)
- 40
- Free/Reduced Lunch
- 13.5%
- Type
- regular
- Setting
- Fringe Rural
- County
- Connecticut Planning Region 3
- Phone
- (860) 434-1651
- Data Year
- 2023–2024
Resources & Links
District
Regional School District 18- District Enrollment
- 1,292
- Schools in District
- 5
- Per-Pupil Spending
- $28,837
- District Rank
- #1 of 5
Other Schools in This District
How We Rate Schools
Every school receives a composite score from 1 to 10 based on four pillars: Academic Performance (50%), Student Growth (20%), Equity (15%), and Learning Environment (15%). Scores are built from publicly available data including standardized test results, enrollment figures, and school climate indicators.
Read our full methodologyRelated reading
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