River Cities United Way River Cities United Way Visit Website P.O. Box 966 Lake Havasu City, AZ 86405 (928) 758-1030 (877) 855-8318 (928) 855-5275 (fax) Hours: Office hours by appointment. Please call. About Map About United Way advances the common good by creating opportunities for a better life for all. Our focus is on education, income and health. We invite you to give, advocate and volunteer. Live United. What's Nearby? Distance: 5 10 15 20 25 50 mi.