Dembidollo (Oromo: Dambi Doolloo), also spelled Dembi Dolo, is a market town and separate woreda in south-western Ethiopia.

[1] The town is served by Dembidollo Airport (ICAO code HADD, IATA DEM).

Originally known as Sayo, after the semi-autonomous kingdom that had ruled in this area in the years after 1900, by 1920 this town served as the seat of the governors of this part of south-western Ethiopia until the Italian conquest.

[2] Richard Pankhurst notes that during this period Dembidolo was "a great commercial centre for coffee, where by the 1930s perhaps 500,000 kilos of beans, besides large quantities of wax and skins, were exported every year to the Sudan.

[4] The last military action of the Oromo Liberation Front (OLF) before the demise of the Derg in 1991 occurred at Dembi Dollo, when some of its units reportedly killed more than 700 government soldiers.