| Image Coa: | WappenBaierbrunn.svg |
| Coordinates: | 48.0167°N 40°W |
| Image Plan: | Baierbrunn in M.svg |
| State: | Bayern |
| Region: | Oberbayern |
| District: | Munich |
| Elevation: | 626 |
| Area: | 7.21 |
| Postal Code: | 82065 |
| Area Code: | 089 |
| Licence: | M |
| Gemeindeschlüssel: | 09 1 84 113 |
| Website: | www.baierbrunn.de |
| Mayor: | Patrick Ott[1] |
| Leader Term: | 2020 - 26 |
Baierbrunn is a municipality in the district of Munich in the south-German state Bavaria. It is located between Schäftlarn and Pullach on the Bundesstraße 11 and consists of the two villages Baierbrunn and Buchenhain. Baierbrunn has a stop on the S7 of the Munich S-Bahn.
Some remains of a hillfort from the Early Middle Ages, called Birg, can be found on the area of the municipality of Baierbrunn. The earliest known mentioning of Baierbrunn was in 776 on a deed of gift from Kloster Schäftlarn. It became an independent municipality in 1818. The village of Buchenhain started 1900 with an inn called "Waldgasthof".There used to be a ski slope until late 1930's, which remains are still visible today in the south of Baierbrunn.[2] The municipality was part of the men's individual road race at the summer Olympics of Munich in 1972
The municipality has two stations on the Isar Valley Railway: and . Both are served by the Munich S-Bahn. Line is S7. The rails are single trail since previous station and trains cross at Baierbrunn station.