| Type: | Stadt |
| Image Coa: | DEU Ottweiler 1975 COA.svg |
| Coordinates: | 49.3667°N 17°W |
| Image Plan: | Ottweiler in NK.svg |
| State: | Saarland |
| District: | Neunkirchen |
| Elevation: | 268 |
| Area: | 45.51 |
| Postal Code: | 66564 |
| Area Code: | 06824, 06858 |
| Licence: | NK |
| Gemeindeschlüssel: | 10 0 43 115 |
| Divisions: | 5 |
| Website: | www.ottweiler.de |
| Mayor: | Holger Schäfer[1] |
| Leader Term: | 2019 - 29 |
| Party: | CDU |
Ottweiler is a municipality, former seat of the district of Neunkirchen, in Saarland, Germany. It is situated on the river Blies, approx. 7 km north of Neunkirchen, and 25 km northeast of Saarbrücken.
The town is notable for the Ottweiler porcelain.
The Ottweiler Brewing Company was founded in Ottweiler in 1873. It was moved to the Karlsberg Brewery in Homburg in 1983.