| Official Name: | Ağoğlan |
| Settlement Type: | Village |
| Pushpin Map: | Azerbaijan#East Zangezur |
| Pushpin Mapsize: | 300 |
| Subdivision Type: | Country |
| Subdivision Name: |  Azerbaijan |
| Subdivision Type1: | District |
| Subdivision Name1: | Lachin |
| Timezone: | AZT |
| Utc Offset: | +4 |
| Timezone Dst: | AZT |
| Utc Offset Dst: | +5 |
| Coordinates: | 39.6467°N 46.4161°W |
Ağoğlan (; formerly known as Kosalar) is a village in the Lachin District of Azerbaijan, close to the village of Hüsülü.[1] The Tsitsernavank Monastery is located near the village.
The village was located in the Armenian-occupied territories surrounding Nagorno-Karabakh, coming under the control of ethnic Armenian forces during the First Nagorno-Karabakh War in the early 1990s.
The village subsequently became part of the self-proclaimed Republic of Artsakh as part of its Kashatagh Province.
It was returned to Azerbaijan as part of the 2020 Nagorno-Karabakh ceasefire agreement.