Hamilton is a city in northern Caldwell County, Missouri, and is within the United States. The population was 1,690 at the 2020 census. It is known as the hometown of James Cash Penney, who built a large apparel-related business, J. C. Penney, and the hometown of Jenny Doan, who has built a large quilting-related business, Missouri Star Quilt Co.

Caldwell County is a county located in Missouri, United States. As of the 2020 census, the county's population was 8,815. It is part of the Kansas City metropolitan area. Its county seat is Kingston. The county was organized December 29, 1836, and named by Alexander Doniphan to honor John Caldwell, who participated in George Rogers Clark's Native American Campaign of 1786 and was the second Lieutenant Governor of Kentucky.