| Hieflau | |
| Settlement Type: | Former municipality |
| Pushpin Map: | Austria |
| Pushpin Mapsize: | 270 |
| Pushpin Map Caption: | Location within Austria |
| Coordinates: | 47.6°N 14.75°W |
| Subdivision Type: | Country |
| Subdivision Name: | Austria |
| Subdivision Type1: | State |
| Subdivision Name1: | Styria |
| Subdivision Type2: | District |
| Subdivision Name2: | Liezen |
| Parts Style: | para |
| Area Total Km2: | 46.97 |
| Elevation M: | 503 |
| Population Total: | 730 |
| Population As Of: | 1 January 2016 |
| Population Footnotes: | [1] |
| Population Density Km2: | auto |
| Timezone: | CET |
| Timezone Dst: | CEST |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Registration Plate: | LN |
| Postal Code Type: | Postal code |
| Postal Code: | 8920 |
| Area Code Type: | Area code |
| Area Code: | 03634 |
| Website: | www.hieflau.steiermark.at |
| Module: | |
Hieflau is a former municipality in the district of Leoben in Styria, Austria. Since the 2015 Styria municipal structural reform, it is part of the municipality Landl, in the Liezen District.[2]