Lahn (disambiguation)

Lahn may refer to:


 * the Lahn, a river in western Germany
 * Lahn, Hesse, a city that existed between 1977 and 1979 as a merger of Wetzlar and Gießen, in Hesse, Germany
 * Lahn, Lower Saxony, a municipality in the district of Emsland, Lower Saxony
 * Lahn (Wald im Pinzgau), a village in the municipality Wald im Pinzgau, Austria
 * Lähn, German name of the town Wleń in Poland