Columbia NJ City Government
1. 628 State Route 94, Columbia, NJ 07832 | Knowlton Township Planning Board(908) 496-4731
2. 628 State Route 94, Columbia, NJ 07832 | Knowlton Township Maintenance Building(908) 496-4265
3. 628 State Route 94, Columbia, NJ 07832 | Knowlton Township Clerk(908) 496-4816