Sioux City--iowa State Of, Iowa Army National Guard 3200 Remington Ave Sioux City, IA 51111 Phone : (712) 255-5235 Business Category Government Offices-State Government Offices State & Local Government Offices & Public Schools Army National Guard 3200 2nd Mech Dr Sioux City, IA 51111 Phone : (712) 255-5235 Business Category National Security