| Kohna Khachmaz | |
| Settlement Type: | Municipality |
| Pushpin Map: | Azerbaijan |
| Pushpin Mapsize: | 300 |
| Subdivision Type: | Country |
| Subdivision Name: |  Azerbaijan |
| Subdivision Type1: | District |
| Subdivision Name1: | Khachmaz |
| Population Total: | 3358 |
| Timezone: | AZT |
| Utc Offset: | +4 |
| Timezone Dst: | AZT |
| Utc Offset Dst: | +5 |
| Coordinates: | 41.4822°N 48.7908°W |
| Official Name: | Azerbaijani: Köhnə Xaçmaz |
Köhnə Xaçmaz (also, Kohna Khachmaz) is a village and municipality in the Khachmaz District of Azerbaijan. It has a population of 3,358.