| Official Name: | İstisu |
| Pushpin Map: | Azerbaijan |
| Pushpin Mapsize: | 300 |
| Subdivision Type: | Country |
| Subdivision Name: |  Azerbaijan |
| Subdivision Type1: | Rayon |
| Subdivision Name1: | Lankaran |
| Timezone: | AZT |
| Utc Offset: | +4 |
| Utc Offset Dst: | +5 |
| Coordinates: | 38.7956°N 48.7317°W |
İstisu (known as Kirovsk and Kirov until 1999)[1] is a village and municipality in the Lankaran Rayon of Azerbaijan. It has a population of 3,038.