Sioux City, IA

ZIP code 51111 is located in Sioux City, Iowa. This area is known for being home to the popular Sergeant Floyd Monument, a tribute to the only casualty of the Lewis and Clark Expedition. Additionally, it houses the Sioux City Railroad Museum, showcasing the city's rich history of railroad transportation. Overall, ZIP code 51111 offers a blend of historical significance and cultural attractions for visitors and residents alike.