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

Of the rest of the land, 10.2% is settled (buildings or roads) and the remainder (1.3%) is non-productive (rivers, glaciers or mountains).

Of the settled areas, 3.9% is covered with buildings, 0.88% is industrial, 0.42% is classed as special developments, 0.21% is parks or greenbelts and 4.78% is transportation infrastructure.

[6] The municipality is located in the lower Wiggertal, on the A2 motorway between Basel and Lucerne.

Most of the population (as of 2000[update]) speaks German (91.0%), with Albanian being second most common ( 2.2%) and Italian being third ( 1.6%).

The age distribution, as of 2008[update], in Dagmersellen is; 1,112 people or 22.9% of the population is 0–19 years old.

[6] In the 2000 census[update] the religious membership of Dagmersellen was; 3,518 (81.5%) were Roman Catholic, and 346 (8.%) were Protestant, with an additional 107 (2.48%) that were of some other Christian faith.

[6] The historical population is given in the following table:[4] Over the last decades Dagmersellen has turned from a farming village into an industrial town, attracting domestic and international companies due to its location.