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Post Offices in South Plainfield

Click on the Post Office from this list of 1 Post Offices in South Plainfield to view the opening hours, phone number, drop-off times, services and other information.

1. USPS Post Office South Plainfield (NJ)
114 Oak Tree Ave
South Plainfield, NJ 07080

The Post Office is open Monday to Sunday from 12:01 am to 11:59 pm.