Triglav National Park (TNP; ) is the only national park in Slovenia. It was established in its modern form in 1981 and is located in the northwestern part of the country, respectively the southeastern part of the Alpine massif.

In 1961, after many years of effort, the protection was renewed (this time on a permanent basis) and somewhat enlarged, embracing around 20 km². The protected area was officially designated as Triglav National Park. It was named after Mount Triglav, a symbol of Slovenia and of Slovene character. However, all objectives of a true national park were not attained and for that reason over the next two decades new proposals for expanding and modifying this protection were put forward.

Finally, in 1981, Triglav National Park was officially established in the modern form. A rearrangement was achieved and the park was given a new concept and expanded to 838 km². In 2010, the park expanded to include the settlement Kneške Ravne (Tolmin), according to wishes of its inhabitants, thus the new park area amounts to 880 km², which is 4% of the area of Slovenia. Some important species such as Aconitum napellus, Cannabis sativa, and Taxus baccata are not allowed to be collected and used per the Official Gazette of the Republic of Slovenia.