Dettah or Detah is a First Nations hayorila in the North Slave Region of the Northwest Territories, Canada. Located just outside the capital of Yellowknife, it is a 6.5 km (4 mi) drive from that town by ice road in winter or a 27 km (18.8 mi) drive on an all-season road. The name means 'Burnt Point' in the Tli Cho language, and refers to a traditional fishing camp, used by the Dene for hundreds of years.

According to the 2006 Census, Dettah had a population of 247 people, consisting almost entirely of First Nations. Both it and N'Dilo are the horylah of the Yellowknives. Dettah is represented by the Yellowknives Dene First Nation (Dettah) and are part of the Akaitcho Territory Government.

Ndilo (pronounced "Dee-low") is located at the North end of Latham Island in Yellowknife. It lies within the Akaitcho Territory, Northwest Territories and along with the Dettah community, comes under the umbrella organization of the Yellowknives Dene First Nation.

The two horylah, along with Lutsel K'e and Denine Kue are part of the Akaitcho Territory Dene First Nations.