Howell Mayor Theresa Berger leads former K-8 School Board member Suzanne Brennan, a Republican, by 2,791 votes for a second four-year term.
Berger’s council running mate, Andre De Garmeaux leads by 1,672 in his race against Deputy Mayor Evelyn O’Donnell.
If they both win, Democrats will gain a 3-2 majority on the council.
The winners will serve for four years.
The Democrats were backed by the State Troopers Fraternal Association and NJ Firefighters Mutual Benevolent Organization.