Römerswil is a municipality in the district of Hochdorf in the canton of Lucerne in Switzerland.

Of the rest of the land, 6.5% is settled (buildings or roads) and the remainder (0.2%) is non-productive (rivers, glaciers or mountains).

Of the agricultural land, 68.53% is used for farming or pastures, while 8.53% is used for orchards or vine crops.

Of the settled areas, 3.3% is covered with buildings, 0.3% is industrial, 0.66% is classed as special developments, 0.12% is parks or greenbelts and 2.16% is transportation infrastructure.

[5] On 1 January 2005, the formerly independent municipality of Herlisberg, lying 3.3 km (2.1 mi) to the northwest, was united with Römerswil.

Most of the population (as of 2000[update]) speaks German (98.3%), with Serbo-Croatian being second most common ( 0.6%) and French being third ( 0.2%).

In the 2000 census[update] the religious membership of Römerswil was; 1,220 (83.1%) were Roman Catholic, and 99 (6.7%) were Protestant, with an additional 11 (0.75%) that were of some other Christian faith.