Ali Sabieh (Somali: Cali Sabiix, Arabic: علي صبيح) is the second largest city in Djibouti.

It is situated about 98 kilometres (61 miles) Southwest of Djibouti City and 10 km (6 mi) north of the border with Ethiopia.

Nomads used to stop at the well for water on their way to the towns of Zeila or Harar, after signing the treaties in 1894 with the then ruling Ugaas of Issa Somali, to establish a protectorate in the region referred to as French Somaliland.

From Harrar Governorate, troops under General Guglielmo Nasi attacked the fort of Ali-Sabieh, there was some skirmishing over the Ethio-Djibouti Railways.

Negotiations at Dewele, Italian East Africa on the local implementation of the armistice were only finally completed on 8 August.

Christian Raimond Dupont surrendered and Colonel Raynal's troops crossed back into French Somaliland on 26 December 1942, completing its liberation.

Following the conclusion of the 1977–1978 Ogaden War, Ali Sabieh, along with Dikhil, accommodated three quarters of the 8,000 Issa Somalis who had fled Ethiopia.

A contracted bus ride from Djibouti city to Ali Sabieh can charge between 700 Djiboutian franc.

Ali Sabieh economy today relies on tourism, agriculture and a number of small factories, most of which are involved in the building trade.

The medium of instruction in both public and private schools is typically French, Arabic and with emphasis on English as a second language.

Its fundamental role in delivering essential medical services to the community, making it an indispensable asset for both residents and travelers alike.

The town has many old quarters, with houses that are typically built with brown and black rocks, and mosques that are usually white washed and some has lost ground to more modern developments.

To the east of Ali Sabieh is a grassland savannah, which attracts many types of wildlife to the area, including black-backed jackal, dorcas gazelle, Felis, caracal, various bird species, and the hamadryas baboon.

The summer season in Ali Sabieh is moderately long, characterized by hot and dry and refreshing breezes with little rain, but relative humidity is generally low, making the heat tolerable.

Average high temperatures are between 32 °C (90 °F) and 37 °C (99 °F) during summer months, and it can sometimes rise up to 40 °C (104 °F) during heat waves, and it can occasionally drop to below 19 °C (66 °F) at night.