Harmanli
| Harmanli Харманли | |
|---|---|
| Coordinates: 41°56′N 25°54′E / 41.933°N 25.900°E | |
| Country | Bulgaria | 
| Province (Oblast) | Haskovo | 
| Government | |
| • Mayor | Cristiano Marchev | 
| Elevation | 60 m (200 ft) | 
| Population  (2021) | |
|  • Total | 18,830 | 
| Time zone | UTC+2 (EET) | 
| • Summer (DST) | UTC+3 (EEST) | 
| Postal Code | 6450 | 
| Area code | 0373 | 
Harmanli (Bulgarian: Харманли [ˈxarmɐnli], Turkish: Harmanlı) is a town in Haskovo Province, south-central Bulgaria. It is the administrative centre of the eponymous Harmanli Municipality.
Near the site of Hamanli in Late Antiquity, during the early 4th-century Cibalensean War, the Battle of Mardia was fought between the Roman emperors Licinius and Constantine the Great. Harmanli was founded 1510 along the road connecting Central Europe and Anatolia.