United Way of Siouxland Categories Non-Profit Organizations PO Box 204 Sioux City IA 51102-0204 (712) 255-3551 (712) 255-3028 Visit Website Hours: 8:00am-5:00pm M-F About Us Human/Social Service Agencies & Entities Rep/Contact Info Sharon Messerschmidt Development Associate Share × Print Email Facebook Twitter LinkedIn Tell a Friend ×