[5][6][7][8] During the 1970s, Sparta High School instituted split sessions to help alleviate problems brought on by increased enrollment.

[16][17] Sparta High School had participated in the Sussex County Interscholastic League until the SCIL was dissolved in 2009 as part of the NJSIAA's restructuring.

[24] The 1976 team won the North I Group II state sectional title with a 34-7 win against Tenafly High School in the championship game.

[25] A punt returned for a touchdown provided the margin needed to win the 1979 North I Group II state sectional title with a 14-7 victory against Garfield High School in the playoff finals to finish the season 10-0-1.

[26][27] The 1980 team finished the season with an 11-0 record after winning the North I Group II state sectional title by defeating Saddle Brook by a score of 13-7 in overtime in the championship game.

[28] A stout defense helped the 1982 team defeat Ridgefield Park High School by a score of 21-14 in the North I Group II sectional championship game to finish the season with a record of 11-0.

[31] The team won consecutive North I Group III sectional titles against River Dell High School, winning by a score of 40-0 in 2013 and 31-23 in 2014.

[37] In 1985, the team finished the season 29-0 after defeating Middle Township in the Group II championship game, played at the Brendan Byrne Arena.

[38] The 2001 girls' basketball team won the North I, Group III state sectional championship with a 36-32 win versus Northern Highlands Regional High School.

[40] The team won the 2003 North I, Group III title with a 34-28 win against Pascack Valley High School in the tournament final.

[41] The 2006 team won the North I, Group III title in a low-scoring match, topping Northern Highlands Regional High School by a final score of 27-18.

[44] In 2005, the softball team won the North I, Group III state title with a 2-1 win against Nutley High School.

Blues Sanction, Key Club, Marching Band/Color Guard, Mock Trial, National Honor Society, Olympian (Yearbook), PDP (Peer Development Program), Science League, Science Olympiad, Strings Club, Student Council, The Oracle (Newspaper), Theater Productions, and a World Language National Honor Society.