U S Government Of--postal Service, Other Postal Stations-madison Area 5315 Black Earth Milwaukee, WI 53202 Phone : (608) 767-2484 Business Category Government Offices & Public Schools Post Office - Black Earth 1341 Mills St Black Earth, WI 53515 Phone : (608) 767-2484 Business Category Post Offices Toll-Free           (800) ASK-USPS