14622 Diné Bizaad (Navajo) 100000 In 1990 an estimated 115,000 people living on the Navajo Nation in northern Arizona and northeastern New Mexico had fluency in Navajo, about 75% of the reservation population, to which must be added a somewhat lower percentage of the 12,000 to 15,000 Navajos living off-reservation. A conservative estimate of the total number of fluent speakers in 1990 would be about 120,000. In 2001, although the population has increased, the number of speakers is probably smaller. North America On 120,000 100000