Mauensee is a municipality in the district of Sursee in the canton of Lucerne in Switzerland.

Of the rest of the land, 6.8% is settled (buildings or roads) and the remainder (7.5%) is non-productive (rivers, glaciers or mountains).

Of the agricultural land, 64.85% is used for farming or pastures, while 3.63% is used for orchards or vine crops.

Of the settled areas, 3.07% is covered with buildings, 0.56% is industrial, 0.28% is classed as special developments, 0.14% is parks or greenbelts and 2.79% is transportation infrastructure.

It consists of the village of Mauensee and the hamlets of Bognau and Kaltbach as well as houses along the lake.

Most of the population (as of 2000[update]) speaks German (96.1%), with Albanian being second most common ( 1.0%) and Serbo-Croatian being third ( 1.0%).

In the 2000 census[update] the religious membership of Mauensee was; 796 (83.1%) were Roman Catholic, and 95 (9.9%) were Protestant, with an additional 6 (0.63%) that were of some other Christian faith.