Armenia–Azerbaijan border

The Armenia–Azerbaijan border (Armenian: Հայաստան–Ադրբեջան սահման, romanized: Hayastan–Adrbejan sahman; Azerbaijani: Azərbaycan–Ermənistan sərhədi) is the international border between the Republic of Armenia and the Republic of Azerbaijan. Estimates of the border's length vary from 996 km (619 mi) to 1,007.1 km (625.8 mi).