Total enrollment
1,278
-3 (0%) vs SY 2020-21
5 schools in Regional School District 18
Connecticut · 1,278 students · 2 cities
Regional School District 18 runs the local public-school system inside Connecticut: 5 K-12 schools serving roughly 1,278 students, with 3 elementary, 1 middle, and 1 high.
4-year change in Regional School District 18
SY 2020-21 vs SY 2024-25School count
5
0 (0%) vs SY 2020-21
Source: NCES Common Core of Data, enrollment-weighted demographic averages
How Regional School District 18 ranks
Among districts| Measure | This district | In Connecticut | In the US |
|---|---|---|---|
| Enrollment ranked largest first | 1,278 | #101 of 132 | #6,034 of 9,234 |
| Number of schools ranked most first | 5 | #73 of 132 | N/A |
| Students per teacher ranked fewest first | 11.2:1 | #55 of 131 | #1,253 of 9,044 |
| Free or reduced-price lunch share ranked highest first | 15.1% | #117 of 132 | #7,747 of 8,164 |
| Diversity index ranked most diverse first | 26.1% | #105 of 110 | #5,172 of 6,853 |
Districts need at least 2 schools and 500 students to be ranked. Test proficiency is ranked within the state only, since each state gives a different test. Each rank links to the full list.
Inside Regional School District 18
Since 2017-18, the 5 district schools that reported both years went from 1,270 to 1,278 students (up 1%) and from 121 to 114 full-time teachers (down 6%), as of 2024-25.
Proficient is the average share of students meeting the state standard across each school's state tests in 2023-24 and 2024-25; schools with fewer than 100 students and schools serving specialized populations are left out. Staffing figures come from the NCES Common Core of Data and count only schools that reported students and teachers in both years.
| Name | City | Level | Grades | Enrollment |
|---|---|---|---|---|
| Lyme-Old Lyme High School | Old Lyme | High | 09-12 | 367 |
| Mile Creek School | Old Lyme | Elementary | KG-05 | 334 |
| Lyme-Old Lyme Middle School | Old Lyme | Middle | 06-08 | 271 |
| Lyme Consolidated School | Lyme | Elementary | KG-05 | 226 |
| Center School | Old Lyme | Elementary | PK-PK | 80 |
About Regional School District 18
Regional School District 18 is a compact Connecticut school district running 5 schools with combined enrollment near 1,278.
Looking at the level breakdown, Regional School District 18 is built around 3 elementary, 1 middle, and 1 high school.
Per-school enrollment averages around 256 in this district, meaningfully below the Connecticut typical of 489.
Five-year track record. Across the same 4-year window, public-school enrollment stayed largely flat: 1,281 students in SY 2020-21 versus 1,278 in SY 2024-25.
On this page, the community for Regional School District 18 discusses sports rivalries, cross-district programs, and shared facilities. Discussions cut across districts, schools, and grade levels.