[9] The Dumont High School Huskies[2] compete in the Big North Conference, which is comprised of public and private high schools in Bergen and Passaic counties, and was established following a reorganization of sports leagues in Northern New Jersey by the New Jersey State Interscholastic Athletic Association (NJSIAA).

[citation needed] The girls volleyball team finished the 1996 season with a record of 19-7 after winning the Group II state championship against New Milford High School in the final match of the tournament.

[25] The baseball team won the 2002 North I, Group II state sectional championship, defeating Hoboken High School 4–3 in the tournament final.

[26] In 2008, the baseball team won the BCSL American League Championship for the first time since 1988, defeating rival River Dell High School by a score of 5–4 in nine innings.

John O'Rourke allowed no earned runs over eight scoreless innings (8 IP, 4 R, 0 ER, 8 H, 6 K, BB).

They finished the year at an overall record of 17–6, losing in the opening round of the North I, Group II State Tournament to Mahwah, 8–3.

[27] Prior to the 2008–09 school year, the district completed renovations of the majority of DHS athletic facilities.

The project included the installation of a state-of-the-art six-lane track, artificial FieldTurf playing surface and lights at the high school.

In 2010, the Dumont Huskies captured their third straight BSCL American Championship title by defeating Tenafly High School, 8–1.

The Dumont High School proudly produces four productions a year with their Youth Theatre actors.

The students have the opportunity to compete against other high schools in pair pieces, scenes, monologues, improvisation, speeches and storytelling.

The team won by a margin of 63 points over second-place finisher Mainland Regional High School.

Dumont High School kept the Looby Cup at home after winning the state championships for a second straight time in 2011.