Baumgartenberg lies at 237 meters. The extension is 4.5 kilometers from north to south, from west to east 6.8 kilometers. The total area is 15.7 kilometers ². 23.6% of the area is forested, 63.7% of the area ais used for agriculture.
Quarters include Amesbach, Au, Baumgartenberg, Deiming, Hehenberger, High, Kolbinger, Kühofen, Fiefs, Mettensdorf, Muhlberg, Obergassolding, Pitzing, Schneckenreit, Steindl and Untergassolding.