Kotlik first appeared on the 1880 U.S. Census as an unincorporated Inuit village of 8 residents. In 1890, it reported 31 residents, of which 9 were native (presumably Inuit) and 22 were "Creole" (mixed Native and Russian). It did not report again on the census until 1920. It was formally incorporated as a city in 1970.
2020 census As of the
2020 census, Kotlik had a population of 655. The median age was 23.7 years. 40.2% of residents were under the age of 18 and 6.6% of residents were 65 years of age or older. For every 100 females there were 114.1 males, and for every 100 females age 18 and over there were 107.4 males age 18 and over. There were 134 households in Kotlik, of which 68.7% had children under the age of 18 living in them. Of all households, 31.3% were married-couple households, 20.1% were households with a male householder and no spouse or partner present, and 27.6% were households with a female householder and no spouse or partner present. About 13.4% of all households were made up of individuals and 4.5% had someone living alone who was 65 years of age or older. of 2000, there were 591 people, 117 households, and 102 families residing in the city. The population density was . There were 139 housing units at an average density of . The racial makeup of the city was 3.55%
White, 93.57%
Native American, and 2.88% from two or more races. 0.34% of the population were
Hispanic or
Latino of any race. There were 117 households, out of which 70.1% had children under the age of 18 living with them, 65.0% were married couples living together, 11.1% had a female householder with no husband present, and 12.8% were non-families. 10.3% of all households were made up of individuals, and 3.4% had someone living alone who was 65 years of age or older. The average household size was 5.05, and the average family size was 5.48. In the city, the age distribution of the population shows 48.2% under the age of 18, 11.2% from 18 to 24, 24.9% from 25 to 44, 12.0% from 45 to 64, and 3.7% who were 65 years of age or older. The median age was 18 years. For every 100 females, there were 114.1 males. For every 100 females age 18 and over, there were 109.6 males. The median income for a household in the city was $37,750, and the median income for a family was $37,969. Males had a median income of $29,583 versus $16,875 for females. The
per capita income for the city was $7,707. About 18.4% of families and 21.1% of the population were below the
poverty line, including 21.8% of those under age 18 and 25.9% of those age 65 or over. ==Education==