XENIA, a city of the United States, the county seat of Greene county, Ohio, is situated in the midst of a rich agricultural region, and on the Pittsburg, Cincinnati, and St Louis and the Dayton, Fort Wayne, and Chicago Railways. It is one of the oldest cities of Ohio, having been laid out in 1803. It is the seat of the Methodist Episcopal Xenia college (1850), a Presbyterian theological seminary (1794), and Wilberforce university (1863), this last designed for the education of coloured youth of both sexes. The population in 1880 was 7026.