Greer, county (643 sq mi/1,665 sq km; 1990 pop. 6,559), SW Okla.; Mangum; 34°55'N 99°33'W. Bounded E by North Fork of Red R. (with Altus Dam in SE); drained also by the Elm and Salt forks of Red R. Quartz Mountain State Park in E, on Altus L. Peanuts; sheep; granite, clay. Mfg. at Mangum. Originally part of Texas. Formed 1907.
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