Rock Valley is a city in Sioux County, Iowa, the North Western corner of Iowa, United States, along the Rock River. The population was 4,059 at the time of the 2020 census. The town of Rock Valley was platted in 1879 by a Colonel Ira Warren, a Civil War veteran, and the Chicago Milwaukee & St. Paul Railway on ground owned by Warren.
The early history of Rock Valley includes some interesting pleasure activities. “The Rock Valley”, a privately owned steamboat, made pleasure cruises from Rock Valley to Doon. “Jacobs Tours” conducted by the local railroad agent included trips to several places in the United States and abroad. The Opera House, which was later demolished, provided facilities for programs and entertainment. Another noteworthy occurrence during Rock Valley’s history was the 4th of July Celebration of 1875 which was held 1/2 mile north of Rock Valley near the Rock River.
Rock Valley provides full-service shopping, quality health care, professional services, excellent job opportunities, and recreational opportunities. They have many local churches and quality education with both local public and private school and several colleges in the area. They are growing and continue to attract new and expanding business and industry.