Guymon is a city in and the
county seat of
Texas County, Oklahoma. As of the
2010 census, the city population was 11,442, an increase of 6.5 percent from 10,472 at the 2000 census. The 2012 census estimate grew to 11,930. Cattle feedlots, corporate pork farms, and natural gas dominate its economy, with wind energy production and transmission recently diversifying land owners farms.