| Coţatcu River | |
| River | |
| Countries | Romania |
|---|---|
| Counties | Buzău County, Vrancea County |
| Tributaries | |
| - left | Slimnic |
| - right | Cireş, Viroage |
| Villages | Coţatcu, Băleşti, Mărtineşti |
| Mouth | Râmnicul Sărat |
The Coţatcu River is a tributary of the Râmnicul Sărat River in Romania.