League Name
| Towns Supported
| Year Established
| President | |
| Challenger League | | 1999 | Michael Bertram | |
Chester-Mendham Little League
| Chester, Mendham
| 1978 | Carl Perri | |
Denville Little League
| Denville | 2018 | Joe Fiumara | |
| Dover Little League | Dover | 1971 | Don Fritch | |
| East Hanover Little League | East Hanover
| 2000 | Brad Zwigard | |
| Florham Park Little League | Florham Park
| 1955 | Brian Perillo | |
| Hanover Little League | Hanover Township
| 1952 | Michael Halibej | |
| Madison Little League | Madison & Harding Twp
| 1952 | Ken Waer | |
| Morris Plains Little League | Morris Plains
| 1962 | Paul Ochab | |
| Morristown American Little League | Morristown & Morris Township
| 1951 | Tim Fell | |
| Morristown National Little League | Morristown & Morris Township
| 1951 | Erik Langsdorf | |
| Mt. Arlington | Mt. Arlington & Roxbury | | Barry Yacker | |
| Par-Troy East Little League | Parsippany | 1962 | Chris Mazzarella | |
| Par-Troy West Little League | Parsippany | 1953 | Frank Neglia | |
| Randolph Little League | Randolph | 1990 | Dave Tamres | |
| Rockaway Boro Little League | Rockaway Boro
| 1992 | Jesse Cerutti | |
| Rockaway Township Little League | Rockaway
| 1991 | John Lombardo | |
| Somerset Hills Little League | Somerset Hills
| | Greg DeGrandpre | |
| Tri-Town Little League | Boonton, Boonton Township, Mountain Lakes & Lincoln Park | 1982 | Ryan Falconer | |
| Wharton Little League | Wharton & Mine Hill
| 1954 | Partrick Downey | |