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

Of the rest of the land, 6.2% is settled (buildings or roads) and the remainder (0.2%) is non-productive (rivers, glaciers or mountains).

Of the agricultural land, 68.4% is used for farming or pastures, while 4.3% is used for orchards or vine crops.

Of the settled areas, 3.18% is covered with buildings, 0.35% is industrial, 0.4% is classed as special developments, 0.13% is parks or greenbelts and 2.12% is transportation infrastructure.

Most of the population (as of 2000[update]) speaks German (95.8%), with Italian being second most common ( 0.7%) and Albanian being third ( 0.6%).

[6] In the 2007 Swiss federal election the most popular party was the CVP which received 42.5% of the vote.

In the 2000 census[update] the religious membership of Ruswil was; 5,226 (83.5%) were Roman Catholic, and 475 (7.6%) were Protestant, with an additional 21 (0.34%) that were of some other Christian faith.