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is a city in Whiteside County, Illinois, United States. The population was 4,447 at the 2000 census. It is the county seat of Whiteside County.
In mid-November 2008, the town's Open Bible Fellowship Church gained national media attention after former pastor Ted Haggard delivered two confessional sermons there.
According to the United States Census Bureau, the city has a total area of 2.1 square miles (5.5 km²), all of it land.