| Riethnordhausen | |
| Type: | Ortsteil |
| Town: | Wallhausen |
| Coordinates: | 51.4167°N 24°W |
| State: | Sachsen-Anhalt |
| District: | Mansfeld-Südharz |
| Verwaltungsgemeinschaft: | Goldene Aue |
| Elevation: | 141 |
| Area: | 6.79 |
| Population: | 563 |
| Stand: | 2006-12-31 |
| Postal Code: | 06528 |
| Area Code: | 0346456 |
| Licence: | MSH |
| Website: | www.vwg-goldene-aue.de |
Riethnordhausen is a village and a former municipality in the Mansfeld-Südharz district, Saxony-Anhalt, Germany. Since 1 July 2009, it is part of the municipality Wallhausen.
Riethnordhausen is situated in the Rieth in the lower Helme valley, north-east of the Kyffhäuser and south-west of Sangerhausen, the capital of the Mansfeld-Südharz, from which the connecting road leads to the place, which crosses here with the road between Kelbra and Artern.