Celina is a city in and the county seat of Mercer County, Ohio, United States. The population was 10,400 at the 2010 census. Celina is situated on the western shores of Grand Lake St. Marys.HistoryJames Watson Riley established Celina in 1834. The settlement was named after Salina, New York.GeographyCelina is located at, at an elevation of 886 feet . According to the United States Census Bureau, the city has a total area of 5.27sqmi, of which 4.98sqmi is land and 0.29sqmi is water.DemographicsAs of the census of 2000, there were 10,303 people, 4,191 households, and 2,745 families residing in the city. The population density was 2,346.9 people per square mile (906.2/km²). There were 4,466 housing units at an average density of 1,017.3/sq mi (392.8/km²). The racial makeup of the city was 97.04% White, 0.18% African American, 0.37% Native American, 0.67% Asian, 0.02% Pacific Islander, 0.62% from other races, and 1.10% from two or more races. Hispanic or Latino of any race were 2.14% of the population.
