Heitersberg, Hill chain in Aargau and Zürich, Switzerland.

Heitersberg is a roughly 13 km long hill chain in the central Swiss Mittelland, running almost north to south in eastern Aargau. It rises from the Chrüzliberg near Baden (514 m) past Baregg, Oberhau, Rüslerhau and Sennenberg to its highest point at 787 m, then drops via the Hasenberg (762 m, with the Hasenberg tower) to the Mutschellen pass at 551 m. The west flank falls gently toward the Reuss valley; the east flank is cut by steep, deeply incised stream valleys. Most of the ridge is wooded, with cleared areas used for farming and pasture.

The chain was long a barrier to west-east traffic in the Mittelland, forcing detours via Baden in the north or the Mutschellen pass in the south. The Bareggtunnel of the A1 opened in October 1970, 1.1 km long between Dättwil and Neuenhof, with a third tube added in June 2003. In May 1975 the 4.9 km railway tunnel between Mellingen and Killwangen opened as part of the Heitersberg line.

The name Heitersberg is shared by the pass road and the hamlet of Heitersberg in the municipality of Spreitenbach (648 m), one of six hamlets on the ridge, alongside Rüsler, Sennenberg, Sennhof, Oberschönenberg and Hasenberg. The best-known road crosses from Oberrohrdorf over the Heitersberg to Spreitenbach; a second runs from Oberrohrdorf over the Rüsler to Neuenhof. Both are closed to motorised through traffic and rarely paved.

The few roads crossing the chain, such as the one from Oberrohrdorf over the Heitersberg to Spreitenbach and the one from Oberrohrdorf over the Rüsler to Neuenhof, are closed to motorised through traffic and rarely paved. The A1 passes underneath in the 1.1 km Bareggtunnel, opened in October 1970 and widened with a third tube in June 2003. The railway crosses in the 4.9 km Heitersberg tunnel between Mellingen and Killwangen, opened in May 1975.

Two prehistoric landslides shape the chain: the Teufelskeller below the Baregg and the Egelsee, a marshy hollow on the steep eastern flank of the main summit. The Hasenberg (762 m) carries a tower of the same name, and the ridge drops south to the Mutschellen pass at 551 m.