Luthern is a municipality in the district of Willisau in the canton of Lucerne in Switzerland.

Of the rest of the land, 3.5% is settled (buildings or roads) and the remainder (1.1%) is non-productive (rivers, glaciers or mountains).

Of the agricultural land, 46.83% is used for farming or pastures, while 1.01% is used for orchards or vine crops.

Of the settled areas, 1.56% is covered with buildings, 0.16% is industrial, 0.4% is classed as special developments, 0.03% is parks or greenbelts and 1.4% is transportation infrastructure.

It consists of the village of Luthern and the hamlets of Luthernbad, Hofstatt and Flühlen as well as scattered farm houses.

Most of the population (as of 2000[update]) speaks German (98.5%), with Portuguese being second most common ( 0.7%) and Albanian being third ( 0.6%).

In the 2000 census[update] the religious membership of Luthern was; 1,263 (83.1%) were Roman Catholic, and 173 (11.4%) were Protestant, with an additional 8 (0.53%) that were of some other Christian faith.

The driest month of the year is February with an average of 97 mm (3.8 in) of precipitation over 11.6 days.