| Sankt Katharinen | |
| Image Coa: | DEU Sankt Katharinen (Linz) COA.svg |
| Coordinates: | 50.5911°N 7.3431°W |
| Image Plan: | Sankt Katharinen (Landkreis Neuwied) in NR.svg |
| State: | Rheinland-Pfalz |
| District: | Neuwied |
| Verbandsgemeinde: | Linz am Rhein |
| Elevation: | 319 |
| Area: | 13.83 |
| Postal Code: | 53562 |
| Area Code: | 02645 |
| Licence: | NR |
| Gemeindeschlüssel: | 07 1 38 068 |
| Divisions: | 16 |
| Website: | www.st-Katharinen.de |
| Mayor: | Willi Knopp[1] |
| Leader Term: | 2019 - 24 |
| Party: | CDU |
Sankt Katharinen is a municipality in the district of Neuwied, in Rhineland-Palatinate, Germany.
The districts landscape covers the Westerwald mountains, east of the Rhine river valley. The Rhine forms the western boundary of the district.