| Alsdorf | |
| Image Coa: | DEU Alsdorf (Westerwald) COA.svg |
| Coordinates: | 50.7767°N 7.8831°W |
| Image Plan: | Alsdorf in AK.svg |
| State: | Rheinland-Pfalz |
| District: | Altenkirchen |
| Verbandsgemeinde: | Betzdorf-Gebhardshain |
| Elevation: | 192 |
| Area: | 5.93 |
| Postal Code: | 57518 |
| Area Code: | 02741 |
| Licence: | AK |
| Gemeindeschlüssel: | 07 1 32 002 |
| Mayor: | Rudolf Staudt[1] |
| Leader Term: | 2019 - 24 |
| Bürgermeistertitel: | Ortsbürgermeister |
| Party: | SPD |
Alsdorf is a municipality in the district of Altenkirchen, in Rhineland-Palatinate, Germany.