Mountain Empire Airport is a public use airport in Smyth County, Virginia, United States. It located nine nautical miles (10 mi, 17 km) northeast of the central business district of Marion (in Smyth County) and 13 nautical miles (15 mi, 24 km) west of Wytheville (in Wythe County). The airport is situated between Interstate 81 and U.S. Route 11 (Lee Highway), near Groseclose. It is owned by Smyth Wythe Airport Commission.This airport is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a general aviation facility. Although many U.S. airports use the same three-letter location identifier for the FAA and IATA, this airport is assigned MKJ by the FAA but has no designation from the IATA (which assigned MKJ to Makoua Airport in Makoua, Republic of the Congo).
