Unterhagen
Unterhagen stands for:
- Unterhagen (Landl), district of Landl (municipality Werfen) , Land Salzburg, Austria
- Unterhagen (Wermelskirchen) , district of Wermelskirchen , North Rhine-Westphalia
- Unterhagen, natural monument in the district of Börde (Saxony-Anhalt), see list of natural monuments in the district of Börde
- Unterhagen, part of the nature reserve Oberhagen near Warstein, North Rhine-Westphalia