The NJ#1 Union Catholic boys, led by Shane Brosnan's course record, broke the course record average, and Miranda Lorsbach of Kent Place won the girls race.
The boys course record at Warinanco Park of 15:42, which was set in 1998 by Tim Styler of Cranford, could fall at Thursday's 84th meet.
It's the third straight title for the Mendham girls, and the Chatham boys captured its first championship since 2014.
McLaughlin broke her own world record in the 400m hurdles and ran on the winning 4x400 relay to earn 2 gold medals at the Olympics in Tokyo this past summer.
West Windsor-Plainsboro North swept the individual titles as Anish Agrawal won the boys race and Zui Chinchalkar was the girls winner.
The star at Bridgewater-Raritan has smashed two course records and is undefeated on the trails this season.
Lilly Shapiro became the first 3-time girls champ to lead Colts Neck to the title, CBA won its 20th straight, and Dan Valentino of Freehold Township won.
Villa Walsh, Wills, Angelone, and Kinnelon also captured titles at Tuesday's meet at Greystone.
It's the 8th straight title for the Cherokee boys, and the 3rd straight for the Cherokee girls. Cherokee won all 8 titles at Friday's meet.
It's the first county title for the Audubon boys in 50 years. Grace Wassell captured the girls title to lead the Highland girls to the championship.
The victory by the North Hunterdon boys snapped a seven-year winning streak by Voorhees.
Caroline Mehlhorn of Montgomery and Jackson Barna of Ridge each won their second individual county XC titles.
The No. 1 ranked Union Catholic boys ran a course record average15:49, and Lara Cota of Summit ran the fastest girls time at Oak Ridge Park in Clark.
The freshman star at Northern Burlington has won all four of her race this season, and she broke the school course record for Holmdel Park.
The star at Lawrenceville owns state records in the 5,000m, 3,200m, and has run the fastest time by a NJ runner in Holmdel Park history.
Jackson Barna's 12:04.8 at the Manhattan Invitational puts him on target to run one of the fastest times ever at Holmdel Park.
Jackson Barna and Marco Langon ran the 2 fastest times of the day, and the Ridge boys, CBA, and the Ridgewood and Mendham girls had the top team performances.
The senior at Ridge moves into the No. 5 spot on the all-time list on the historic 2.5-mile layout in the Bronx.
The West Morris boys, Pingry girls, Tara Smurla and Theodore Kuelker also captured titles at Friday's meet at Oak Ridge Park in Clark.
The distance running star has run 17:36 at Holmdel Park, and has personal bests on the track of 4:54.38 for 1,600m, and 10:20.25 for 3,200m.
Angelia Perez of Lakeland became the first girl to ever run under 17:40 twice at Holmdel Park with her time of 17:37 on Saturday.
Marco Langon, a senior at Bridgewater-Raritan, ran a Somerset County course record 15:30, the fastest time during Saturday's meet at Holmdel Park.
The senior star has a PR of 15:53 at Garret Mountain, and ran 4:13.00 for 1600m, and 9:09.69 for 3200m last spring.
At the Meet of Champions last spring, Jackson won the 400-meter run and anchored Scotch Plains-Fanwood's winning 4x400m relay.
Zawatski, Slavinski, Mahoney, and Donlevie also captured individuals titles at Saturday's meet.
CBA and the Haddonfield girls each won their races, and the Haddonfield boys finished a very strong second.
Barna ran 8:52.00 for 3,200 last spring, and smashed the Ocean County Park record last week with a time of 14:41.
A parade of runners ran eye-popping times at Saturday's meet at Oak Ridge Park in Clark.
The senior at Delsea is one of the hottest runners in the state so far this season.
The 2022 NJSIAA Indoor Meet of Champions will not be held at the state of the art Ocean Breeze facility in Staten Island.