Hartnett earned the Landmark Conference Tournament MVP after draining four of six shots from beyond the arc.
Chatham's Maddie Hartnett, Tess Ford, Shannon Donohoe, and Caryl Frohnapfel earn NJ Hoops honors.
The Lady Cougars beat Irvington, Summit, and West Morris to get the finals, while The Lady Blue Streaks defeated Rahway, Payne Tech, and Mendham to set up the Championship game.
Hartnett, a University of Scranton-commit, poured in a game-high 18 points,
Senior Maddie Hartnett drained a game-high 16 points and Shannon Donohoe posted a double-double with 12 points and 14 rebounds as Chatham won its seventh straight contest to capped the regular season on a winning note.
Chatham's Maddie Hartnett and Montville's Emma Wax lead their teams to MCT Championship game.
Chatham advances to play 10th-seeded Morris Knolls in the tournament semifinal next Saturday.
Players from Chatham, Bayonne, Villa Walsh, and Morristown-Beard make the list.
Maddie Hartnett enjoyed another impressive tilt, dropping in 24 points for Chatham.
Maddie Hartnett drained four three-pointers in scoring a game-high 18 points while Shannon Donohoe chipped in with nine points and 11 rebounds for Chatham.