Ohio
From just over 45,000 residents in 1800, Ohio's population grew at rates of over 10% per decade (except for the 1940 census) until the 1970 census, which recorded just over 10.65 million Ohioans. Growth then slowed for the next four decades. The United States Census Bureau estimates that the population of Ohio was 11,689,442 on July 1, 2018, a 1.33% increase since the 2010 United States Census. Ohio's population growth lags that of the entire United States, and Caucasians are found in a greater density than the United States average. , Ohio's center of population is located in Morrow County, in the county seat of Mount Gilead. This is approximately south and west of Ohio's population center in 1990.
List of counties in Indiana
As of the 2010 United States Census, the population of Indiana was 6,483,802, the average population of Indiana's 92 counties is 70,476, with Marion County as the most populous (903,393), and Ohio County (6,128) the least. 54 counties have 30,000 or more people; 17 counties have populations exceeding 100,000, five of which exceed 250,000; and only four counties have fewer than 10,000 people. The average land area is . The largest county is Allen (657 sq. mi., 1,702 km²) and the smallest is Ohio (86 sq. mi., 223 km²). According to the Constitution of Indiana, no county may be created of less than , nor may any county smaller than this be further reduced in size, which precludes any new counties.