Feldkirchen in Kärnten is a town in the Austrian state of Carinthia and the capital of the district of the same name. It consists of the Katastralgemeinden Fasching, Feldkirchen, Glanhofen, Gradisch, Hoefling, Klein Sankt Veit, Pernegg, Rabensdorf, Sankt Ulrich, Sittich, Tschwarzen and Waiern.
The settlement may have developed at the site of the former Beliandrum mansio along the Roman road from Teurnia near Spittal an der Drau to Virunum, capital of the Noricum province. A Roman tombstone of the 2nd century is included into the walls of the Saint Michael filial church. The earliest mention of Feldkirchen is as Ueldchiricha ("Church in the Fields") in a 888 document by Arnulf of Carinthia. The parish church Maria im Dorn, a Romanesque basilica with a Carolingian choir, is one of the oldest sacred buildings in Carinthia.