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

Of the rest of the land, 13.8% is settled (buildings or roads) and the remainder (0.3%) is non-productive (rivers, glaciers or mountains).

Of the agricultural land, 69.83% is used for farming or pastures, while 4.67% is used for orchards or vine crops.

Of the settled areas, 6.22% is covered with buildings, 0.47% is industrial, 0.62% is classed as special developments, 0.16% is parks or greenbelts and 2.8% is transportation infrastructure.

It consists of the village of Geuensee and the hamlets of Krummbach and Hunzikon.

Most of the population (as of 2000[update]) speaks German (85.9%), with Albanian being second most common ( 5.7%) and Serbo-Croatian being third ( 2.7%).

In the 2000 census[update] the religious membership of Geuensee was; 1,340 (68.9%) were Roman Catholic, and 203 (10.4%) were Protestant, with an additional 91 (4.68%) that were of some other Christian faith.