Town Hall Address 641 Plainsboro Rd. Plainsboro, NJ 08536 United States- Middlesex County Website https://www.plainsboronj.com/ County Clerk 609-799-0909 641 Plainsboro Rd. Plainsboro, NJ 08536 United States Assessor 609-799-0909 641 Plainsboro Rd. Plainsboro, NJ 08536 United States Tax Collector 609-799-0909 641 Plainsboro Rd. Plainsboro, NJ 08536 United States Attorney 609-896-4222 641 Plainsboro Rd. Plainsboro, NJ 08536 United States Mayor 609-799-0909 641 Plainsboro Rd. Plainsboro, NJ 08536 United States Municipal Court 609-799-0893 641 Plainsboro Rd. Plainsboro, NJ 08536 United States County Middlesex