Frommenhausen is a suburban district of Rottenburg am Neckar in the administrative district of Tübingen in Baden-Württemberg (Germany).
Frommenhausen is located 9 km (5.59 mi) southwestern from Rottenburg am Neckar on the Gäu-Plateau with an elevation from 369 to 493 m.
The area of the district is 362 hectares. Thereof fall 73.4% upon agriculturally used area, 14.7% upon forest area, 9.4% upon settlement area and roads, and 1.9% upon other.
The territories of the following villages adjoin to Frommenhausen, they are called clockwise beginning in the north: Schwalldorf, Hirrlingen and Wachendorf. All villages are in the admin. district of Tübingen.
The village has a population of 467 people<small>(31/01/08)</small>. So it is the smallest district of Rottenburg. At an area of 3.62 km<sup>2</sup> (2.2 sq mi) this corresponds to a population density of 129 people per km<sup>2</sup>, or 334 per sq mi.
Most of the population is Roman Catholic.