The Hagberg is a hill, 585.2 m above sea level (NN),[1] in the county of Ostalbkreis in the German state of Baden-Württemberg.

In former times the Hagberg (as e. g. the Asperg and the Hesselberg) formed part of the border between the Swabians and Franks.

The Hagberg lies 2.4 km (as the crow flies) west of the municipality of Gschwend in the Welzheim Forest.

From the two observation platforms there are views in good weather as far as Stuttgart, Heilbronn, Crailsheim and Aalen.

The tower also acts as the starting point for walks in the densely forested region around Gschwend.