Obertrum am See is a market town in the district of Salzburg-Umgebung in the state of Salzburg in Austria.

[3] The town is located roughly 15 km north of Salzburg in the Flachgau at the southern end of the Obertrumer See.

Obertrum am See was first mentioned in 1143 as "Druma", which is a rough equivalent of "south end of the sea".

Until 1398 the bishopric of Passau had control over the region near Mattsee, which included Obertrum.

This Salzburg state location article is a stub.