| Buch a.Erlbach | |
| Image Coa: | Wappen von Buch am Erlbach.svg |
| Coordinates: | 48.45°N 15°W |
| Image Plan: | Buch am Erlbach in LA.svg |
| State: | Bayern |
| Region: | Niederbayern |
| District: | Landshut |
| Elevation: | 441 |
| Area: | 26.71 |
| Postal Code: | 84172 |
| Area Code: | 08709 |
| Licence: | LA |
| Gemeindeschlüssel: | 09 2 74 121 |
| Website: | www.buch-am-erlbach.de |
| Mayor: | Elisabeth Winklmaier-Wenzl[1] |
| Leader Term: | 2020 - 26 |
| Party: | CSU |
Buch is a municipality in the district of Landshut in Bavaria in Germany.
The name "Buch am Erlbach" means "beech at alder brook".