Lyme-Old Lyme High School

Set in Old Lyme, Connecticut, Lyme-Old Lyme High School is a small four-year high school, run under Regional School District 18. It instructs 367 students across grades 9 through 12. That puts it 53% leaner than the typical public school in Connecticut, which averages around 788 students.

Regional School District 18 runs 5 schools in total, collectively educating 1,278 students. Lyme-Old Lyme High School is one of those campuses.

Demographically, Lyme-Old Lyme High School records that 81% of students identify as White, making the school strongly White-majority. The remainder breaks down as 8% Hispanic, 5% Asian, 4% multiracial. Compared to Lower Connecticut River Valley Planning Region overall, the school's racial mix sits in roughly the same range.

On the resource side, The school employs 38 full-time-equivalent teachers, for a student-teacher ratio near 9.6:1. The state averages around 12.3:1, so this campus is tighter than the state norm typical. About 13% of enrolled students meet the income threshold for free or reduced-price lunch, a number frequently used as a low-income enrollment indicator. That share is south of Lower Connecticut River Valley Planning Region's rate of about 32%.

Zooming out to the county, ACS estimates for Lower Connecticut River Valley Planning Region put median household income runs about $104,428, roughly 46% of adults have completed at least a four-year degree, and roughly 4% of residents live below the federal poverty line. Across Lower Connecticut River Valley Planning Region's 57 public schools (combined enrollment of about 19,075 students), Lyme-Old Lyme High School is one campus in the mix.

Lyme-Old Lyme Middle School is the nearest neighboring public school, about 0.1 miles from this campus. Counting just inside five miles, 6 other public schools cluster around Lyme-Old Lyme High School.

Lyme-Old Lyme High School operates from a small-town location.

Over the past 7-year window. Over the past 7-year window, the student count decreased 22%: 473 students in 2018 compared to 367 in 2025. The White share of enrollment shrank from 91% to 81% over that span.

Inside the community feed, the page collects discussion, questions, and updates around pickup logistics, teacher feedback, and after-school programs. Parents, students, alumni, and staff are welcome to weigh in.