United States Government--post Offices, Nichols Shiocton, WI 54170 Phone : (920) 525-3131 Business Category Post Offices Government Offices & Public Schools Post Office - Nichols W5624 County Road F Nichols, WI 54152 Phone : (920) 525-3131 Post Office - Nichols Business Category Post Offices Toll-Free           (800) ASK-USPS