Harrah is a city in Oklahoma County, Oklahoma, United States, and a part of the Oklahoma City metropolitan area. Located 25 miles east of do…Harrah is a city in Oklahoma County, Oklahoma, United States, and a part of the Oklahoma City metropolitan area. Located 25 miles east of downtown Oklahoma City, Harrah had a population of 6,245 people as of the 2020 Census, a 22.6% increase from 2010.