Located in the West Welega Zone of the Oromia Region, this town has a latitude and longitude of 9°30′N 35°30′E / 9.500°N 35.500°E / 9.500; 35.500 with an elevation of 1821 meters above sea level.

In his travel book, In Search of King Solomon's Mines, Tahir Shah described Nejo in the late 20th century as a town with "a muddy main street", lined with "buildings with corrugated iron roofs and cement walls".

[3] In 1904 Onesimos Nesib arrived at Nejo to establish a mission, together with his wife, his children, and a group of associates including Aster Ganno.

The Dejazmach invited Onesimos to settle next to his gebbi, gave him a large piece of tax-free land, and built him a house and a school.

"The stock-in-trade is a small neatly worked basket," wrote Herbert Weld Blundell who visited the area in 1905, "containing pebbles ground to equal the weights required for weighing out the gold, a small copper balance, and finally, the gold-dust in quills The amount of gold exported from Nejjo has been put by engineers living there at about £80,000 a year, and the tribute of the king is about one-half of this.