Independence is a city in, and the county seat of, Buchanan County, Iowa, United States. The population was 6,064 in the 2020 census, an increase from 6,014 in 2000. History Independence was founded in 1847 near the center of present-day Buchanan County. The original town plat was a simple nine-block grid on the east side of the Wapsipinicon River. The town was intended as an alternative to Quasqueton (then called Quasequetuk), which was the county seat prior to 1847. The village of Independence had fewer than 15 persons when the county seat was transferred there. On Main Street, on the west bank of the Wapsipinicon, a six-story grist mill was built in 1867. Some of its foundation stones were taken from that of an earlier mill, the New Haven Mill, built in 1854, that was used for wool processing. (Prior to the incorporation of Independence in 1864, a short-lived neighboring village, called New Haven, had grown up on the west side of the river, hence the name New Haven Mill.) The 1867 mill, now called the Wapsipinicon Mill, was a source of electrical energy from 1915 to 1940. Some structural restoration occurred in recent years, and the mill now functions partly as an historical museum. A courthouse was built in 1857, on the east side of the town, on a site described at that time as "the highest tract of land in the neighborhood," where offers "a fine view of the city of Independence, the Valley of the Wapsipinicon, and the surrounding Country". The original courthouse was replaced in 1939 by a Moderne or Art Deco structure. Among the town's distinctions has been the long-term presence of the Independence State Hospital (formerly called the Iowa State Hospital for the Insane), located on a large, remote tract of land on the west edge of town. The recently restored main building, called the Reynolds Building (made of "native prairie granite" in French Second Empire style), was built in 1873. Today it is open to the public for scheduled tours. For a few years in the late 1880s and early 1890s, Independence was a nationally known horse-racing center, and was sometimes referred to as the "Lexington of the North". This came about as a result of the meteoric financial success of Charles W. Williams. A telegraph operator and creamery owner from nearby Jesup, Iowa, Williams (with no experience in breeding horses) purchased in