2020 census As of the
2020 census, Atkins had a population of 2,859. The median age was 40.8 years. 23.7% of residents were under the age of 18 and 21.3% were 65 years of age or older. For every 100 females, there were 88.7 males, and for every 100 females age 18 and over there were 86.0 males. There were 1,153 households in Atkins, including 759 families.
2010 census As of the census of 2010, there were 3,016 people in 1,118 households, including 849 families, in the city. The population density was . There were 1,288 housing units at an average density of . The
racial makeup of the city was 95.6% White, 0.9% Black or African American, 0.8% Native American, 0.1% Asian, 1.2% from other races, and 1.2% from two or more races. 2.3% of the population were Hispanic or Latino of any race. Of the 1,118 households 30.4% had children under the age of 18 living with them, 53% were married couples living together, 12.1% had a female householder with no husband present, and 28.4% were non-families. 25.3% of households were one person and 11.2% were one person aged 65 or older. The average household size was 2.50 and the average family size was 2.95. The age distribution was 23.4% under the age of 18, 9.4% from 18 to 24, 25% from 25 to 44, 24.5% from 45 to 64, and 17.7% 65 or older. The median age was 38.8 years. For every 100 females, there were 90.4 males. For every 100 females age 18 and over, there were 90.7 males. The median household income was $40,112 and the median family income was $49,754. Males had a median income of $33,191 versus $38,833 for females. The per capita income for the city was $18,605. About 6.4% of families and 8.8% of the population were below the poverty line, including 6.3% of those under age 18 and 7.9% of those age 65 or over. ==Notable people==