Tetlin first appeared on the 1940 U.S. Census as an unincorporated village. It was made a census-designated place (CDP) in 1980. As of the census of 2000, there were 117 people, 42 households, and 25 families residing in the CDP. The population density was . There were 55 housing units at an average density of . The racial makeup of the CDP was 2.56%
White, 94.87%
Native American, and 2.56% from two or more races. Of the 42 households, 26.2% had children under the age of 18 living with them, 19.0% were married couples living together, 23.8% had a female householder with no husband present, and 38.1% were non-families. 28.6% of all households were made up of individuals, and 4.8% had someone living alone who was 65 years of age or older. The average household size was 2.79 and the average family size was 3.46. In the CDP, the age distribution of the population shows 27.4% under the age of 18, 15.4% from 18 to 24, 29.1% from 25 to 44, 19.7% from 45 to 64, and 8.5% who were 65 years of age or older. The median age was 30 years. For every 100 females, there were 178.6 males. For every 100 females age 18 and over, there were 203.6 males. The median income for a household in the CDP was $12,250, and the median income for a family was $18,750. Males had a median income of $0 versus $0 for females. The
per capita income for the CDP was $7,372. There were 40.0% of families and 48.4% of the population living below the
poverty line, including 61.3% of under eighteens and 28.6% of those over 64. ==Education==