| Image Coa: | Wappen Unterstadion.svg |
| Coordinates: | 48.2033°N 9.6894°W |
| Image Plan: | Unterstadion in UL.svg |
| State: | Baden-Württemberg |
| Region: | Tübingen |
| District: | Alb-Donau-Kreis |
| Elevation: | 508 |
| Area: | 8.84 |
| Postal Code: | 89619 |
| Area Code: | 07393 |
| Licence: | UL |
| Gemeindeschlüssel: | 08 4 25 124 |
| Website: | www.unterstadion.de |
| Mayor: | Uwe Handgrätinger[1] |
| Leader Term: | 2019 - 27 |
Unterstadion is a municipality in the district of Alb-Donau in Baden-Württemberg in Germany. It is located about south of the state capital of Stuttgart