| Image Coa: | DEU Langenmosen COA.svg |
| Coordinates: | 48.6°N 24°W |
| Image Plan: | Langenmosen in ND.svg |
| State: | Bayern |
| Region: | Oberbayern |
| District: | Neuburg-Schrobenhausen |
| Verwaltungsgemeinschaft: | Schrobenhausen |
| Elevation: | 403 |
| Area: | 23.89 |
| Postal Code: | 86571 |
| Area Code: | 08433 |
| Licence: | ND |
| Gemeindeschlüssel: | 09 1 85 143 |
| Divisions: | 4 Gemeindeteile |
| Website: | www.langenmosen.de |
| Mayor: | Mathilde Ahle[1] |
| Leader Term: | 2020 - 26 |
| Party: | CSU |
Langenmosen is a municipality in the district of Neuburg-Schrobenhausen in Bavaria in Germany.