Emmen is a city in the district of Hochdorf in the canton of Lucerne in Switzerland.
Emmen is first mentioned in 840 as Emau.
Emmen has an area of. Of this area, 46.6% is used for agricultural purposes, while 18.2% is forested. Of the rest of the land, 33.3% is settled (buildings or roads) and the remainder (1.9%) is non-productive (rivers, glaciers or mountains)., 18.19% of the total land area was forested. Of the agricultural land, 44.69% is used for farming or pastures, while 1.92% is used for orchards or vine crops. Of the settled areas, 14.55% is covered with buildings, 5.7% is industrial, 1.62% is classed as special developments, 1.97% is parks or greenbelts and 9.49% is transportation infrastructure. Of the unproductive areas, 0.25% is unproductive standing water (ponds or lakes), and the other 1.62% is unproductive flowing water (rivers).
The municipality is part of the metropolitan area of Lucerne. It is located at the confluence of the Kleine Emme into the Reuss River. It consists of the sections of Emmen, Rottertswil, Gerliswil, Emmenweid and Emmenbaum which together make up the region of Emmenbrücke.
The city of Emmen hit international headlines in 2001 when it announced new naturalization law. While there are some fixed requirements for obtaining Swiss citizenship by naturalization set at the federal level, such as the requirement to live and work for 12 years and speak the local language, Swiss cantons and communities are free to introduce more stringent requirements. Until 2001, naturalization was run by a popularly elected committee. But Emmen decided to have the citizens themselves run the nationalization process, requiring that potential citizens pass a series of tests and public interviews and subjecting citizenship applications to the public vote.