Russians (50.3%), the Yakuts (Sakha people) (33.4%), and Ukrainians (7%) are the three most common nationalities inhabiting Sakha.

Official languages are Yakut (also known as Sakha), spoken by approximately 25% of the population, and Russian. The Yakut language is Turkic with Mongolian influence and some borrowings from Sakha's Paleosiberian indigenous peoples.

• Population: 949,280 (2002)
  • Urban: 609,999 (64.3%)
  • Rural: 339,281 (35.7%)
  • Male: 464,217 (48.9%)
  • Female: 485,063 (51.1%)
• Females per 1000 males: 1,045
• Average age: 30.0 years
  • Urban: 31.0 years
  • Rural: 27.4 years
  • Male: 30.0 years
  • Female: 26.6 years
• Number of households: 305,017 (with 937,954 people)
  • Urban: 212,593 (with 600,696 people)
  • Rural: 92,424 (with 337,258 people)