Harrah is a city in Oklahoma County, Oklahoma, United States, and a part of the Oklahoma City metropolitan area. Located 25 miles (40 km) east of downtown Oklahoma City, Harrah had a population of 5,095 people as of 2012.The first settler of the area, who was Potawatomi, arrived in the 1870s, but the town was not incorporated until 1908. The town was settled by Americans, Polish immigrants and other groups and had a cotton ginning center.