Obermillstatt is a village and cadastral community in the municipality of Millstatt in Spittal an der Drau District, in Carinthia, Austria.
Archaeological excavations date back to the Late Bronze Age (1200-1000 BC), when the Millstätter Berg plateau was settled by Illyrian, later also Celtic tribes, who had moved into the area from the northwestern Balkans.
However, the Catholic parish church St John the Baptist was not mentioned until 1205; the present building was erected under the Jesuit rule in 1614.
Situated on the slope above the village centre, the church can be widely seen by its massive tower with the big onion dome.
The small but richly decorated nave has a Late Gothic lierne vault from the 16th century and Baroque frescoes of the Madonna from about 1716.