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.
History of 19th-century congressional redistricting in Ohio
Ohio entered the Union on February 19, 1803 a few weeks before the end of the Seventh Congress. From 1803 to 1812, the entire state constituted a single representative district in Congress, held by Jeremiah Morrow for all five terms. In the Seventh Congress Ohio had a population of 47,500; in the Eighth, when the state was first fully represented, the population was 68,850; in the Ninth the population numbered 91,280; in the Tenth it rose to 150,965, and in the Eleventh it reached 250,325, so that the member from Ohio not only represented the largest geographical territory of any single congressman, but about three times as large a constituency as any other.