| Image Coa: | DEU Peterslahr COA.svg |
| Coordinates: | 50.6131°N 7.4822°W |
| Image Plan: | Peterslahr in AK.svg |
| State: | Rheinland-Pfalz |
| District: | Altenkirchen |
| Verbandsgemeinde: | Altenkirchen-Flammersfeld |
| Elevation: | 170-293 |
| Area: | 3.31 |
| Postal Code: | 57632 |
| Area Code: | 02685 |
| Licence: | AK |
| Gemeindeschlüssel: | 07 1 32 089 |
| Website: | www.peterslahr.de |
| Mayor: | Alois Weißenfels[1] |
| Leader Term: | 2019 - 24 |
Peterslahr is a municipality in the district of Altenkirchen, in Rhineland-Palatinate, Germany.