
There were 148,273 housing units at an average density of 317.5 per square mile (122.6/km 2). The population density was 788.2 inhabitants per square mile (304.3/km 2). Adjacent countiesĪs of the 2010 census, there were 368,130 people, 135,960 households, and 95,404 families residing in the county. The soil at highest uplands is frequently heavy in clay, moving downhill to a sandy loam, while in the valleys the soil is black with river deposits.īefore deforestation by settlers, much of the area was forests of American beech and maple trees. The valley was originally carved by glaciation. The majority of Butler County consists of the river valleys of the Great and Little Miami Rivers. Census Bureau, the county has a total area of 470 square miles (1,200 km 2), of which 467 square miles (1,210 km 2) is land and 3.1 square miles (8.0 km 2) (0.7%) is water. Geography and geologyĪccording to the U.S. In addition to a 625-acre man made lake, the park contains the 200 acre Hueston Woods, one of the last near- virgin growths of American beech and maple in Ohio. In 1957 the Ohio Legislature established Hueston Woods State Park which covers 3,596 acres in Butler and neighboring Preble County, Ohio. In the 1920s, Butler, Pickaway and Washington Counties were central areas of the rural membership of the Ku Klux Klan in Ohio. The Great Flood of 1913 impacted much of the county, particularly the communities of Middletown, Ohio where approximately 25% of the town was flooded and 6 people died and Hamilton, Ohio, where 46% of the city was flooded, over 300 buildings destroyed and at least 98 people killed. The original size of Butler County was 480 sq miles. Some land that was originally part of Butler County was later reassigned to Warren County in the north and Hamilton County to the south.

Large portions of the county were held by non resident owners, including 640 acres owned by future President William H Harrison. Between 18, the townships of the county became officially recognized. White settlers began moving into the area in larger numbers after the 1793 Treaty of Greenville was signed with the Native Americans of the area.īutler County was formed on Mafrom portions of Hamilton County. The gravesites of David and Margaret Gregory indicate that they were some of the first white settlers in the area in Liberty Township. Early French explorers likely passed through the area along the Miami River.
