Hamr may refer to:
Hamr (folklore), in Norse mythology and Nordic folklore, a shape, form or figure someone can shift into Heat-assisted magnetic recording (HAMR), a technology for hard disk data storage
Places in the Czech Republic Hamr (Jindřichův Hradec District), a municipality and village in the South Bohemian Region Hamr na Jezeře, a municipality and village in the Liberec Region Hamr, a village and part of Litvínov in the Ústí nad Labem Region Hamr, a village and part of Val (Tábor District) in the South Bohemian Region
See also Hamry (disambiguation)