There was no indoor plumbing until a major addition was made to the building about 1910, so outdoor toilets were used for about fifteen years.

Matawan Regional High School was built to deal with sharp population growth due to the construction of 2,300 new housing units in the area.

[18] The sports department received a renovated artificial turf football field and stadium lighting.

[25] The Matawan High School baseball team (63-2) won the Central Jersey championship three consecutive years from 1922 to 1924 under Coach Benjamin W. Davis.

Matawan's African-American pitcher Henry Schanck was edged out by Keyport High School in a 16-inning match in 1924.

Their star pitcher, Carl Stephens, threw three no-hitters that season and was signed by the Los Angeles Dodgers, playing in their minor league system until an arm injury ended his career.

[26] The Matawan Catfish swim team competed against the Laurence Harbor Eels at nearby Lake Lefferts in spring 1936.

They defeated their rivals, the Keyport High School Red Raiders in a hard-fought Thanksgiving Day game, by a score of 6–2.

[33] The 1991 team won the Central Jersey Group II title with a 28–14 victory against Ocean Township High School to finish the season 9–2.

[34] In 1992, the team finished the season 10-1 and won its second Central Jersey Group II sectional title with a 29–28 win against Neptune High School on a Two-point conversion scored in overtime.

[41] The indoor team won a second consecutive title in 2010, defeating second place Summit High School by a score of 56–42 in the finals.

[42] In 2011, the outdoor track and field team won its third consecutive Central Jersey, Group II sectional title, edging Long Branch High School 80-77 for the victory.

[46] The boys' basketball team won the 2013-14 Central Jersey Group II state sectional championship with a 67–54 win in the tournament final against Rumson-Fair Haven Regional High School, going 24-5 throughout the season.

Matawan returned the most coupons, defeating its nearest competitor by 40,000 votes, thereby winning a Chickering and Sons piano.

[50] In the 2011 season, the Marching Huskies finished first in the Tournament of Bands (TOB) Group II Chapter X (Greater NYC Metro) Championships with a score of 93.0.

[51] In the 2024 season, the Marching Huskies finished first in the USBands Group 1A State Championships in South Brunswick, New Jersey with a score of 92.4.

[52] The band ended the season with a second place finish at the USBands A Class National Championships in Allentown, Pennsylvania with a score of 95.0, also achieving best effect and colorguard.