Gjern is a former railway town in central Denmark with a population of 1,529 (1 January 2025), located in Silkeborg Municipality in Region Midtjylland in Jutland, Denmark.
The town is the site of Jysk Automobilmuseum, a large museum of automobiles. Gjern has also a ski resort called Dayz Søhøjlandet Alpint Skicenter.