Bad Niedernau is a suburban district of Rottenburg am Neckar in the administrative district of Tübingen in Baden-Württemberg (Germany).

Bad Niedernau is located 3 km (1.86 mi) southwest of Rottenburg am Neckar in the Neckar-valley with an elevation from 430 to 475 m.

The area of the district is 410 hectares. 52.5% is agriculturally used area, 32.3% forest area, 7.7% settled area and roads, 5.3% water expanse, and 2.2% other.

The following territories adjoin to Bad Niedernau, clockwise beginning in the north they are: Rottenburg (town), Weiler, Schwalldorf and Obernau (all in the admin. district of Tübingen). Weiler, Schwalldorf and Obernau are districts of Rottenburg am Neckar.

Bad Niedernau has a current population of 569 people (31/01/08). In order to that Bad Niedernau is among the smaller districts of Rottenburg. The population density is 139 people per km² (359 per sq mi), according to an area of 4.10 km² (1.6 sq mi).

The population of the village is predominantly Roman Catholic.

The former municipality of Bad Niedernau has awarded the honorary citizenship to Kilian von Steiner (Banker) in 1891.

• Official Webpage (German)
• Historical picture postcards