Prien am Chiemsee (official: Prien a.Chiemsee, High German [priːn], Bavarian (local) dialect [breˑɐ̯̃ⁿ]) is a municipality in the Upper Bavarian district of Rosenheim in Germany.

The town is a certified air and Kneipp spa on the western shore of the lake of Chiemsee, 16 kilometres (9.9 mi) east of Rosenheim.

The Chiemsee-Bahn is a 2-kilometre (1.2 mi) narrow-gauge steam-operated seasonal tourist line connecting the Prien station with Lake Chiem at Prien-Stock.

From there boats operate to Herreninsel in the lake, on which is a royal palace built by King Ludwig II of Bavaria in the latter nineteenth century.

Bundesautobahn 8, which also connects Munich and Salzburg, can be reached a few kilometers south of the community on state road 2092.