Sebastian River High School in Sebastian

Sebastian River High School is the School District of Indian River County public high school for grades 9 to 12 at 9001 Shark Blvd in Sebastian, with a school day of 7:20 am to 2:07 pm.

The school's site lists 7:20 am to 2:07 pm, grades 9-12, the main number 772-564-4170 and a fax of (772) 564-4182, and describes Sebastian River High as An International Baccalaureate (IB) World School (Sebastian River High School). The district's 2026-2027 Parent Guide gives the same 9001 Shark Boulevard address and a 9th-12th span (SDIRC Parent Guide, page 14).

One quirk trips up map apps and forms: the federal school directory records the Sebastian River High campus at 9001 90TH AVE, not Shark Boulevard, and files it under the locale Rural, Fringe (NCES). Both addresses point to the same Sebastian campus; the district and the school use Shark Boulevard, so that is the address to give a ride service or a delivery.

Sebastian River High is one of two schools in the district directory listed with a 9th-12th span; the other is Vero Beach High School at 1707 16th Street in Vero Beach, and Sebastian River Middle at 9400 CR 512 is the middle school with a Sebastian address on the same list (SDIRC Parent Guide, page 15).

The neighbors on Highway 510 matter at drop-off time. Indian River County Emergency Management places Treasure Coast Elementary at 8955 85th Street just east of Sebastian River High School (Indian River County Emergency Management), and that elementary school starts at 9:00 am, well after the 7:20 am high school bell. Two K-8 campuses will also start sending eighth graders toward high school: the Parent Guide lists Pelican Island Classical Magnet on Schumann Drive in Sebastian and Fellsmere Academy in Fellsmere as K-8 by 2027-2028 (SDIRC Parent Guide, page 14).

Sebastian River High School had 1,777 students and 77 full-time-equivalent classroom teachers in 2024-2025, about 23 students per teacher, according to NCES.

The federal Common Core of Data counts 1,777 students at the Sebastian high school, with 77.00 classroom teachers and a student/teacher ratio of 23.08, and 920 boys and 857 girls (NCES). It counted 939 Sebastian River High students eligible for free or reduced-price lunch that year.

The four Sebastian River High classes were nearly even in 2024-2025, within 19 students of each other, so the senior class at Sebastian River High was only 19 students smaller than the freshman class. The NCES figures are a year old by design: the 2025-2026 directory carries 2024-2025 enrollment, so the current count at Shark Boulevard will differ.

Sebastian River High School calls itself an International Baccalaureate (IB) World School, and a student from outside its zone asks for a seat through the district School Choice application.

The school's home page carries the line An International Baccalaureate (IB) World School, with the motto Encouraging Innovation & Promoting Excellence (Sebastian River High School). The current school site does not post an IB program page, application steps or the IB course sequence, so a family weighing the IB route should call the school at 772-564-4170 before the choice deadline.

For a seat at Sebastian River High from outside its zone, the 2026-2027 Parent Guide sets the choice process: the School Choice application is open each year from November 1 to the end of June for the next school year, parents need a Focus account linked to the student, each application can list up to three choice schools, and after the lottery parents have ten days to accept or decline (SDIRC Parent Guide, page 23). An application filed in November is in the pool for the following August, while one filed in July waits a full year.

Getting to Shark Boulevard is a separate question for a choice student. The district BusPlanner page says a student attending a choice or charter school is given a depot stop location, that depot stops are not within walking distance of home addresses, and that parents must call 772-978-8801 and press 2 for routing (SDIRC BusPlanner). A student zoned for Sebastian River High confirms that with the district BusPlanner Which School do I Attend? search for the 2026-2027 school year, where the transportation office has the final word on any discrepancy (SDIRC BusPlanner).

Sebastian River High students can earn college credit through Indian River State College dual enrollment and career certificate credit through Treasure Coast Technical College, both co-sponsored by the School District of Indian River County.

The 2026-2027 Parent Guide says the district and Indian River State College co-sponsor college courses in high schools during normal class hours, after normal class hours and in the summer term, and students who complete them earn both high school and college credit (SDIRC Parent Guide, page 29). The Dual Enrollment program at Treasure Coast Technical College is open to high school juniors and seniors who meet the entrance requirements through a formal application, counts toward both high school graduation and a career certificate, and waives tuition, books and lab industry certification fees. The same page notes that every Career and Technical Education program offers a recognized Industry Certification.

Dual enrollment runs through Indian River State College, whose page lists a Sebastian River High School dual enrollment contact at (772) 564-4403 (Indian River State College). The steps are to meet the high school counselor for a GPA and credit check, then apply to the college and submit the Dual Enrollment Program Agreement, Form 508. Under the college's readiness rules, a student with an unweighted high school GPA of 3.0 and a B or better in a listed full-credit course has demonstrated readiness for college-level work, and public school students in Indian River County get their textbooks free through their high school.

Sebastian River High School earned an A in Florida's 2025-26 school grades with 68 percent of possible points, its second straight A, and the state file shows a 98 percent graduation rate for 2024-25.

The Florida Department of Education file dated September 1, 2026 lists Sebastian River High with 676 points across 10 components, 68 percent of total possible points and 96 percent of students tested (FLDOE school grades file). The A line for high schools in that file is 65 percent, so the Sebastian school cleared it by 3 points. Its components were 65 in English Language Arts achievement, 59 in ELA learning gains, 58 in ELA gains of the lowest 25 percent, 45 in math achievement, 42 in math gains, 58 in math gains of the lowest 25 percent, 80 in science, 80 in social studies, a 2024-25 graduation rate of 98 and college and career acceleration of 91.

Math is where Sebastian River High has the most room: math achievement of 45 and math learning gains of 42 are the two lowest components, against 80 in science and social studies. The file lists the school as not Title I, with 58.3 percent of students economically disadvantaged (FLDOE school grades file). The A grades of 2025 and 2026 are the first back-to-back A years for the Shark Boulevard school since 2012 and 2013.

Last verified: October 14, 2026, on the Sebastian River High School site, the School District of Indian River County Parent Guide, Indian River State College, NCES and the FLDOE school grades file.