| Langenstein | |
| Pushpin Map: | Austria |
| Pushpin Mapsize: | 270 |
| Pushpin Map Caption: | Location within Austria |
| Coordinates: | 48.2586°N 14.4642°W |
| Subdivision Type: | Country |
| Subdivision Name: | Austria |
| Subdivision Type1: | State |
| Subdivision Name1: | Upper Austria |
| Subdivision Type2: | District |
| Subdivision Name2: | Perg |
| Parts Style: | para |
| Leader Title: | Mayor |
| Leader Name: | Christian Aufreiter |
| Elevation M: | 245 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Timezone Dst: | CEST |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Registration Plate: | PE |
| Postal Code Type: | Postal code |
| Postal Code: | 4222, 4310, 4312 |
| Area Code Type: | Area code |
| Area Code: | 07237 |
| Website: | www.langenstein.at |
Langenstein is a municipality in the district of Perg in the Austrian state of Upper Austria.
Langenstein lies in the Mühlviertel. About 27 percent of the municipality is forest, and 51 percent is farmland.