Union County Post Office

Find Union County New Jersey post offices and USPS mailing boxes. Post offices provide information on bulk mail services, domestic mail delivery, international shipping, change of address, mail forwarding, PO boxes, and passport services.


Bayway Post Office 544 Bayway Elizabeth NJ 07202 908-351-0983


Berkeley Heights Post Office 364 Springfield Avenue Berkeley Heights NJ 07922 908-464-1115

Clark Post Office 1087 Raritan Road Clark NJ 07066 732-381-0261

Cranford Post Office 3 Miln Street Cranford NJ 07016 908-276-3506

Elizabeth Post Office 310 North Broad Street Elizabeth NJ 07208 908-820-8540

Elmora Post Office 175 Elmora Avenue Elizabeth NJ 07202 908-354-5697

Fanwood Post Office 275 South Avenue Fanwood NJ 07023 908-322-7978

Garwood Post Office 202 Center Street Garwood NJ 07027 908-789-0315

Grasselli Post Office 938 South Wood Avenue Linden NJ 07036 908-862-3984

Hillside Post Office 1146 Liberty Avenue Hillside NJ 07205 908-527-0648

Industrial Hillside Post Office 397 Hillside Avenue Hillside NJ 07205 973-926-1240

Jobstown Post Office 2206 Saylors Pond Road Springfield NJ 08041 609-723-2586

Juliustown Post Office 393 Main Street Springfield NJ 08042 609-894-4648

Kenilworth Post Office 641 Kenilworth Boulevard Kenilworth NJ 07033 908-241-9823

Linden Post Office 400 Wood Avenue Linden NJ 07036 908-925-8836

Mountainside Post Office 604 Sherwood Parkway Mountainside NJ 07092 908-233-0148

Muhlenberg Post Office 1080 Arlington Avenue Plainfield NJ 07060 908-753-1480

Netherwood Post Office 1120 North Avenue Plainfield NJ 07062 908-753-0445

New Providence Post Office 598 Central Avenue New Providence NJ 07974 908-665-2075

North Elizabeth Post Office 772 Newark Avenue Elizabeth NJ 07208 908-355-0176

Plainfield Post Office 201 Watchung Avenue Plainfield NJ 07060 908-226-5256

Rahway Post Office 123 East Milton Avenue Rahway NJ 07065 732-388-3264

Roselle Park Post Office 290 Chestnut Street Roselle Park NJ 07204 908-241-8541

Roselle Post Office 104 Chestnut Street Roselle NJ 07203 908-245-3218

Scotch Plains Post Office 536 Park Avenue Scotch Plains NJ 07076 908-322-0674

Springfield Post Office 225 Mountain Avenue Springfield NJ 07081 973-376-9185

Sta A Linden Post Office 340 West Saint Georges Avenue Linden NJ 07036 908-486-1844

Sta A Plainfield Post Office 14 Clinton Avenue Plainfield NJ 07063 908-753-6618

Summit Post Office 61 Maple Street Summit NJ 07901 908-277-1737

Union Square Post Office 946 Elizabeth Avenue Elizabeth NJ 07201 908-352-2338

Vauxhall Post Office 2215 Springfield Avenue Union NJ 07088 908-686-2341

Westfield Post Office 153 Central Avenue Westfield NJ 07090 908-233-4053

About Post Offices

What Change of Address options are available?

Customers can request a temporary or permanent Change of Address either online or in person at the Post Office using PS Form 3575. The online application for Change of Address has a $1.00 identity validation fee.

Is it possible to insure mail and items sent via the USPS?

Yes. Standard mail can be insured for up to $5,000 for an additional fee. Registered mail items can be insured for up to $50,000.

What is the USPS Office of Inspector General?

The Office of Inspector General (OIG) is a division within the USPS responsible for ensuring the integrity and accountability of the postal service. It conducts investigations to safeguard the postal system and performs audits and reviews.