| Lengau | |
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Lengau
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| Country | Austria |
| State | Upper Austria |
| District | Braunau am Inn |
| Mayor | Erich Rippl (SPÖ) |
| Area | 58.1 km2 (22 sq mi) |
| Elevation | 530 m (1739 ft) |
| Population | 4,369 (1 January 2011)[1] |
| - Density | 75 /km2 (195 /sq mi) |
| Time zone | CET/CEST (UTC+1/+2) |
| Licence plate | BR |
| Postal code | 5211 |
| Area code | 07746 |
| Website | www.gemeindelengau.at |
Lengau is a municipality in the district Braunau am Inn in Upper Austria, Austria.