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.
Dayton metropolitan area
The Dayton, OH Metropolitan Statistical Area (also known as Greater Dayton), as defined by the United States Census Bureau, is an area consisting of three counties in the Miami Valley region of Ohio and is anchored by the city of Dayton. As of 2000 it is the fourth largest metropolitan area in Ohio and the 61st largest Metropolitan Area by Population in the United States. As of the 2010 census, the MSA had a population of 799,232 based on a change in MSA defining criteria as of 2013, which eliminated Preble County. This exclusion was applied retroactively to the 2010 population figures.