| Coordinates | 48°14′22″N 9°36′37″E |
|---|---|
| State | Baden-Württemberg |
| Region | Tübingen |
| District | Alb-Donau-Kreis |
| Elevation | 506 |
| Area | 5.61 |
| Postal code | 89617 |
| Area code | 07393 |
| Licence | UL |
| Gemeindeschlüssel | 08 4 25 123 |
| Mayor | Bernhard Ritzler |
| Leader term | 2016–24 |
Untermarchtal is a municipality in the district of Alb-Donau in Baden-Württemberg in Germany.