| Sankt Marein im Mürztal | |
| Settlement Type: | Municipality |
| Pushpin Map: | Austria |
| Pushpin Mapsize: | 270 |
| Pushpin Map Caption: | Location within Austria |
| Coordinates: | 47.4744°N 15.3711°W |
| Subdivision Type: | Country |
| Subdivision Name: | Austria |
| Subdivision Type1: | State |
| Subdivision Name1: | Styria |
| Subdivision Type2: | District |
| Subdivision Name2: | Bruck-Mürzzuschlag |
| Parts Style: | para |
| Leader Title: | Mayor |
| Leader Name: | Günther Ofner |
| Elevation M: | 537 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Timezone Dst: | CEST |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Registration Plate: | BM |
| Postal Code Type: | Postal code |
| Postal Code: | 8641 |
| Area Code Type: | Area code |
| Area Code: | 03864 |
| Website: | www.st-marein-muerztal.steiermark.at |
Sankt Marein im Mürztal is a municipality in the district of Bruck-Mürzzuschlag in Styria, Austria.
Red bull founder and co-owner Dietrich Mateschitz was born here.