| Blankenbach | |
| Source1 Location: | in Fallborn, west of (Sailauf) |
| Mouth Location: | at Kleinblankenbach (community of Blankenbach in the Kahl |
| Mouth Coordinates: | 50.0653°N 9.2305°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Germany |
| Subdivision Type2: | State |
| Subdivision Name2: | Bavaria |
Blankenbach is a small river of Bavaria, Germany.
It is a left tributary of the Kahl in the district Aschaffenburg of the Bavarian Spessart.
Originally Blankenbach means as much as blinking brook. The stream gave its name to the municipality Blankenbach.
The Blankenbach springs from Fallborn, between (Sailauf) and Blankenbach. It runs through a ravine in a north-westerly direction to Kleinblankenbach (a community of Blankenbach). In front of the sports field it flows into a piping. Below the bridge Kahlbrücke, opposite the railway station of the railway, it flows into the Kahl.