Welcome to Harmon County ...Time Zone: Harmon County lies in the Central Time Zone (CST/CDT) and observes daylight saving time. The community of Hollis is the Seat for Harmon County. Harmon County was founded in 1909 and was created by taking area from Greer County. From the Census Estimates for 2019, <1> Harmon had a population of 2,653 people. This is a decrease of 9.17% since the last Census (which gave a population of 2,921 people in 2010). At the time of the 2010 Census, Harmon represented 0.08% of the total population of Oklahoma. Websites of Interest ...
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