as a member of NASA's Project Mercury space program. Gus Grissom was the second American to fly in space on Liberty Bell 7 and also flew aboard Gemini 3. He died in a launch pad fire at Kennedy Space Center in Florida during a training exercise for Apollo 1 on January 27, 1967. Spring Mill State Park is located just east of Mitchell. It includes a memorial to Grissom as well as several caves and a pioneer village. The buildings in the village are original structures from the former mill town that was located here, recreations of buildings in the town, and other pioneer-era buildings that were moved to the park. The Monon became part of the Louisville and Nashville Railroad. Both it, and the former B&O are now part of CSX Transportation's rail network. In modern times, Mitchell is also served by the Union Pacific system. In the late 20th century, Mitchell's downtown area was defined as a historic district that was listed on the National Register of Historic Places. The town developed an Urban Enterprise Zone, and industrial park, and at the end of the century, was working to attract new businesses and industry while also capitalizing on its heritage through antique shops and tourism. The Mitchell Downtown Historic District and Mitchell Opera House are listed in the National Register of Historic Places. Geography According to the 2010 census, Mitchell has a total area of , of which (or 99.85%) is land and (or 0.15%) is water. Demographics 2010 census As of the census of 2010, there were 4,350 people, 1,786 households, and 1,145 families living in the city. The population density was . There were 2,014 housing units at an average density of . The racial makeup of the city was 97.6% White, 0.4% African American, 0.2% Native American, 0.3% Asian, 0.1% Pacific Islander, 0.7% from other races, and 0.8% from two or more races. Hispanic or Latino of any race were 1.4% of the population. There were 1,786 households, of which 33.2% had children under the age of 18 living with them, 43.8% were married couples living together, 15.0% had a female householder with no husband present, 5.3% had a male householder with no wife present, and 35.9% were non-families. 31.9% of all households were made up of individuals, and 15.5% had someone living alone who was 65 years of age or older. The average household