Jonathan Dayton High School is a four-year comprehensive public high school serving students in ninth through twelfth grades in Springfield Township, in Union County, in the U.S. state of New Jersey. The school is part of the Springfield Public Schools and is named after Jonathan Dayton, a signer of the United States Constitution. The school is accredited by the Middle States Association of Colleges and Schools Commission on Elementary and Secondary Schools.Jonathan Dayton High School, Middle States Association of Colleges and Schools Commission on Elementary and Secondary Schools. Accessed February 6, 2022.

As of the 2024–25 school year, the school had an enrollment of 654 students and 47.4 classroom teachers (on an FTE basis), for a student–teacher ratio of 13.8:1. There were 105 students (16.1% of enrollment) eligible for free lunch and 24 (3.7% of students) eligible for reduced-cost lunch.School data for Jonathan Dayton High School, National Center for Education Statistics. Accessed January 15, 2026.

History Springfield Township became one of the six constituent municipalities of the Union County Regional High School District when it was established, joining Berkeley Heights, Clark, Garwood, Kenilworth and Mountainside. Voters approved the construction of the district's first high school in Springfield at a referendum held November 1, 1935, just eleven days after a successful referendum to create the district. The school opened to students in September 1937 as the first school in the district. The original building contained 27 classrooms, three science labs, three shops, a library, a cafeteria, a gymnasium, an auditorium, and offices.

The school has been expanded several times in subsequent years. A former Civilian Conservation Corps administration building was moved to the site from Meisel Avenue in March 1942 to serve as a classroom for the vocational program in agriculture. The agriculture program continued until 1970, when it was discontinued due to the decline in farming within the district. A 21-room addition was completed in September 1953 at a cost of $1.32 million after being approved by voters in a November 1951 referendum. The addition contained 20 classrooms, three science labs, two shops, two music rooms, a gymnasium, and offices; renovations were completed to portions of the original building at the same time. On May 4, 1971, voters approved a $4.7 million bond referendum to expand and renovate each school in the district. At Dayton, the addition of three science labs, two classrooms, two music rooms, an auxiliary gymnasium, and an instructional media center, and various renovations and expansions were completed by September 1973. An athletic complex was completed on the school's front lawn in September 2013.

Amid conflict between the constituent municipalities about financing a district described as "the highest-spending regional high school in the state" and anger from residents impacted by the closure of David Brearley High School, a referendum was held in May 1996 in which voters approved a proposal to breakup the regional district. With the district's dissolution at the end of the 1996–97 school year Jonathan Dayton High School was turned over to the Springfield Public Schools, which became a K-12 district.Hanley, Robert. "Schools Weigh Impact Of District Breakup", The New York Times, May 16, 1996. Accessed April 28, 2021. "They are Springfield, with Dayton High; Berkeley Heights, with Governor Livingston High; Clark, with Arthur Johnson High, and Kenilworth, with Brearley High, which closed three years ago but will reopen after Commissioner Klagholz sets a date for the formal dissolution. Many expect it will be June 30, 1997. The district's two towns without high school buildings -- Garwood and Mountainside -- will remain kindergarten-to-eighth-grade districts and ship out their high school students. Mountainside's will go to Livingston High in Berkeley Heights."Paglia, Bernice. "Stakes high in vote on deregionalization", Courier News, May 13, 1996. Accessed April 28, 2021, via Newspapers.com. "In 1992 the Union County Regional High School District 1 board voted to close one of its four high schools, a move aimed at saving $4 million. That move may come full circle on Tuesday, when voters from six municipalities will decide whether to dissolve the district itself, which state Education Commissioner Leo Klagholz has called 'the highest-spending regional high school in the state.'"

Awards, recognition and rankings In the 2011 "Ranking America's High Schools" issue by The Washington Post, the school was ranked 60th in New Jersey and 1,732nd nationwide.Mathews, Jay. , The Washington Post. Accessed September 10, 2011. The school was the 991st-ranked public high school in the United States out of over 26,000 schools in the country, 29th in the state of New Jersey, in Newsweek magazine's "America's Top High Schools 2010" edition."America's Top High Schools 2010: # 991 Dayton Springfield, NJ", Newsweek, June 13, 2010. Accessed June 11, 2011.

The school was the 113th-ranked public high school in New Jersey out of 339 schools statewide in New Jersey Monthly magazine's September 2014 cover story on the state's "Top Public High Schools", using a new ranking methodology.Staff. "Top Schools Alphabetical List 2014", New Jersey Monthly, September 2, 2014. Accessed September 5, 2014. The school had been ranked 26th in the state of 328 schools in 2012, after being ranked 40th in 2010 out of 322 schools listed.Staff. "The Top New Jersey High Schools: Alphabetical", New Jersey Monthly, August 16, 2012. Accessed August 23, 2012. The magazine ranked the school 32nd in 2008 out of 316 schools.Staff. "2010 Top High Schools", New Jersey Monthly, August 16, 2010. Accessed March 16, 2011. The school was ranked 44th in the magazine's September 2006 issue, which included 316 schools across the state."Top New Jersey High Schools 2008: By Rank", New Jersey Monthly, September 2008; posted August 7, 2008. Accessed August 19, 2008. Schooldigger.com ranked the school tied for 76th out of 381 public high schools statewide in its 2011 rankings (an increase of 109 positions from the 2010 ranking) which were based on the combined percentage of students classified as proficient or above proficient on the mathematics (89.5%) and language arts literacy (96.4%) components of the High School Proficiency Assessment (HSPA)., Schooldigger.com. Accessed February 27, 2012.

In its 2013 report on "America's Best High Schools", The Daily Beast ranked the school 716th in the nation among participating public high schools and 55th among schools in New Jersey.Streib, Lauren. "America's Best High Schools" , The Daily Beast, May 6, 2013. Accessed May 9, 2013.

Curriculum Jonathan Dayton offers Advanced Placement (AP) classes in the humanities (AP English Language and Composition, AP Art History, AP Studio Art, AP Music Theory, AP United States History, AP European History, and AP Psychology), sciences (AP Chemistry, AP Physics, and AP Biology), and (AP Calculus BC and AP Statistics) and AP Computer Science. All students have laptops.

Extracurricular activities

Publications Jonathan Dayton is home to three publications, The Dawg Print, Jargon, and the yearbook. The former is the school's newspaper, which is released tri-yearly. Jargon is Jonathan Dayton's Literary Magazine, which displays the school's body of creative writing. Jargons content can be submitted through the school's creative writing classes, or of the writer's own accord.

Athletics The Jonathan Dayton High School BulldogsJonathan Dayton High School, New Jersey State Interscholastic Athletic Association. Accessed October 20, 2020. compete in the Union County Interscholastic Athletic Conference, following a reorganization of sports leagues in Northern New Jersey by the New Jersey State Interscholastic Athletic Association (NJSIAA).League & Conference Officers/Affiliated Schools 2020-2021, New Jersey State Interscholastic Athletic Association. Accessed October 20, 2020. With 451 students in grades 10–12, the school was classified by the NJSIAA for the 2019–20 school year as Group I for most athletic competition purposes, which included schools with an enrollment of 75 to 476 students in that grade range.NJSIAA General Public School Classifications 2019–2020, New Jersey State Interscholastic Athletic Association. Accessed November 20, 2020. Prior to the NJSIAA's 2010 realignment, the school had participated in the Mountain Valley Conference, which included schools in Essex County and Union County.Home Page, Mountain Valley Conference, backed up by the Internet Archive as of February 2, 2011. Accessed November 26, 2014. The football team competes in Division 1B of the Big Central Football Conference, which includes 60 public and private high schools in Hunterdon, Middlesex, Somerset, Union and Warren counties, which are broken down into 10 divisions by size and location.Kinney, Mike. "Big Central revises 2020 football schedule for its shortened inaugural season", NJ Advance Media for NJ.com, August 12, 2020. Accessed April 18, 2021. "The newly formed Big Central Football Conference has released a revised 2020 schedule for its inaugural season.... the BCFC is comprised of schools from Middlesex, Union, Somerset, Hunterdon and Warren counties." The school was classified by the NJSIAA as Group II North for football for 2024–2026, which included schools with 484 to 683 students.NJSIAA Football Public School Classifications 2024–2026, New Jersey State Interscholastic Athletic Association, updated September 2024. Accessed September 1, 2024.

Sports offered at Jonathan Dayton High School include:Fall Sports: Football (Varsity, JV & Freshman), Soccer (Boys', Varsity & JV), Soccer (Girls', Varsity & JV), Cross Country (Boys & Girls, Varsity), Volleyball (Varsity & JV), Gymnastics (Varsity), Cheerleading (Varsity) and Tennis (Girls' Varsity & JV).Winter Sports: Bowling (Co-ed JV, Varsity) Basketball (Boys' Varsity, JV & Freshman), Basketball (Girls' Varsity & JV), Indoor Track (Boys' & Girls' Varsity), Swimming (Co-ed, Varsity), Ice Hockey (co-op with David Brearley High School), Cheerleading (Varsity & JV) and Wrestling (co-op with David Brearley High School).Spring Sports:''' - Baseball (Varsity & JV), Softball (Varsity & JV), Boys' Lacrosse (Varsity & JV), Girls' Lacrosse (Varsity & Jv), Spring Track (Boys' & Girls, Varsity & JV), Tennis (Boys' Varsity & JV) and Golf (Co-ed Varsity)

The school participates as the host school / lead agency in joint cooperative gymnastics, ice hockey and co-ed swimming teams with David Brearley High School; the co-op ice hockey team also includes Union High School. Brearley is the host school for a joint wrestling team. These co-op programs operate under agreements scheduled to expire at the end of the 2023–24 school year.NJSIAA Fall Cooperative Sports Programs, New Jersey State Interscholastic Athletic Association. Accessed December 1, 2020.NJSIAA Winter Cooperative Sports Programs, New Jersey State Interscholastic Athletic Association. Accessed December 1, 2020.

The boys' basketball team won the Group III state championship in 1950, defeating Union Hill High School in the tournament final.NJSIAA Boys Basketball Championship History, New Jersey State Interscholastic Athletic Association. Accessed November 20, 2020.Christie, Sherlon. "Boys: Asbury Park ends 23-year state championship drought", Asbury Park Press, March 13, 2011. "Asbury Park hasn’t won a state title since 1987 when the school was in Group II and defeated Orange and Dayton hasn’t won a state title since 1950, then as Springfield Regional, when it defeated Union Hill. Prior to Sunday night’s game, Dayton hasn’t played in a state final since 1955 when the Bulldogs (22-6) lost to Cliffside Park for the Group III title and Asbury Park (25-5) played in the 2009 Group I state final and lost to University 65-54."