Alsen

Alsen may refer to:

Places

 * Als Island, Denmark; called Alsen under Prussian/German administration (1864–1920)
 * Alsen, North Dakota, US
 * Alsen, South Dakota, US
 * Alsen, Sweden, a parish and former municipality in Jämtland County, Sweden
 * Alsen, a hamlet in Catskill, New York, US

People

 * Herbert Alsen (1906–1978), German operatic bass
 * Elsa Alsen (1880–1975), Prussian-born American operatic soprano