Langenstein
Municipality
Coat of arms
Langenstein Location within Austria
Coordinates: 48°15′31″N 14°27′51″E / 48.25861°N 14.46417°E / 48.25861; 14.46417
Country	Austria
State	Upper Austria
District	Perg
Government
• Mayor	Christian Aufreiter (SPÖ)
Area [1]
• Total	12.36 km2 (4.77 sq mi)
Elevation	245 m (804 ft)
Population  (2018-01-01)[2]
• Total	2,534
• Density	210/km2 (530/sq mi)
Time zone	UTC+1 (CET)
• Summer (DST)	UTC+2 (CEST)
Postal code	4222, 4310, 4312
Area code	07237
Vehicle registration	PE
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.