[3] The municipality (Gemeinde) of Neidlingen covers 12.60 square kilometers (4.86 sq mi) of the Esslingen district of Baden-Württemberg, a state of the Federal Republic of Germany.

The municipality is physically located along the northern edge of the central foothills [de] of the Swabian Jura, and stretches form the heights of the upper valley of the Lindach to the albtrauf of the Fils.

Its boundaries generally decided by the lay of the albtrauf, which sits atop the Brown and White Jurassic formations.

The Lindach and its valley begins to the southwest of the town in a plateau of the Jura that averages an elevation above sea level of 760 meters (2,490 ft) Normalnull (NN).

Beyond this, the Lindach continues and marks the lowest elevation above sea level in the municipal area, 423 meters (1,388 ft) NN.

[3] Neidlingen is east of the Randecker Maar (a former volcanic vent) and is part of the Swabian Alps Biosphere Reserve [de].

The tincture was decided in 1953, and on 15 June 1953, the coat of arms was approved for official use by the provisional Württemberg-Baden government.