| Official Name: | Agachaul |
| Native Name: | Агачаул Агач-аул |
| Settlement Type: | Selo |
| Pushpin Map: | Russia Dagestan#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Type1: | Region |
| Subdivision Name1: | Republic of Dagestan |
| Subdivision Type2: | County |
| Subdivision Type3: | District |
| Subdivision Name3: | Karabudakhkentsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +3:00 |
| Coordinates: | 42.9167°N 74°W[1] |
Agachaul (Russian: Агачаул; Kumyk: Агач-аул, Agaç-aul) is a rural locality (a selo) in Karabudakhkentsky District, Republic of Dagestan, Russia. The population was 1,811 as of 2010.[2] There are 22 streets.[3]
Kumyks live there.
Agachaul is located 39 km northwest of Karabudakhkent (the district's administrative centre) by road. Novy Kyakhulay and Talgi are the nearest rural localities.[4]