Brownwood Regional Airport is six miles north of Brownwood, in Brown County, Texas. The National Plan of Integrated Airport Systems for 2011–2015 categorized it as a general aviation facility. The 21st Cavalry Brigade of the III C…Brownwood Regional Airport is six miles north of Brownwood, in Brown County, Texas. The National Plan of Integrated Airport Systems for 2011–2015 categorized it as a general aviation facility. The 21st Cavalry Brigade of the III Corps, U.S. Army use the airport for training in Apache and Blackhawk helicopters.