Heinfels is a municipality in the district of Lienz, in the Austrian state of Tyrol. It lies in the eastern part of the Tyrol, within the Lienz district, which covers the region around the town of Lienz in the Puster Valley.
The municipality is best known as the site of Burg Heinfels, a castle that stands above the village and gives the community its name. The castle is the settlement's principal historic landmark and the feature most commonly associated with it.
Heinfels is also known as the gateway to the Loacker factory, the production site of the Loacker confectionery company, which is located in the area and draws visitors to the municipality.