2020 census

As of the 2020 census, Blunt had a population of 342. The median age was 37.2 years. 31.6% of residents were under the age of 18 and 20.2% of residents were 65 years of age or older. For every 100 females there were 101.2 males, and for every 100 females age 18 and over there were 103.5 males age 18 and over. ^[12]

0.0% of residents lived in urban areas, while 100.0% lived in rural areas. ^[13]

There were 137 households in Blunt, of which 36.5% had children under the age of 18 living in them. Of all households, 43.8% were married-couple households, 27.0% were households with a male householder and no spouse or partner present, and 16.1% were households with a female householder and no spouse or partner present. About 32.1% of all households were made up of individuals and 16.8% had someone living alone who was 65 years of age or older. ^[12]

There were 153 housing units, of which 10.5% were vacant. The homeowner vacancy rate was 0.0% and the rental vacancy rate was 11.9%. ^[12]

2010 census

As of the census ^[15] of 2010, there were 354 people, 150 households, and 102 families residing in the city. The population density was 722.4 inhabitants per square mile (278.9/km²). There were 167 housing units at an average density of 340.8 per square mile (131.6/km²). The racial makeup of the city was 89.3% White, 2.5% African American, 4.8% Native American, 0.3% Asian, 1.7% from other races, and 1.4% from two or more races. Hispanic or Latino of any race were 4.0% of the population.

There were 150 households, of which 25.3% had children under the age of 18 living with them, 58.0% were married couples living together, 3.3% had a female householder with no husband present, 6.7% had a male householder with no wife present, and 32.0% were non-families. 28.0% of all households were made up of individuals, and 14% had someone living alone who was 65 years of age or older. The average household size was 2.36 and the average family size was 2.76.

The median age in the city was 46.6 years. 23.2% of residents were under the age of 18; 5.9% were between the ages of 18 and 24; 19.2% were from 25 to 44; 33.4% were from 45 to 64; and 18.4% were 65 years of age or older. The gender makeup of the city was 52.0% male and 48.0% female.

2000 census

As of the census ^[5] of 2000, there were 370 people, 153 households, and 106 families residing in the city. The population density was 752.7 inhabitants per square mile (290.6/km²). There were 178 housing units at an average density of 362.1 per square mile (139.8/km²). The racial makeup of the city was 94.86% White, 2.70% Native American, 1.35% from other races, and 1.08% from two or more races. Hispanic or Latino of any race were 1.35% of the population.

There were 153 households, out of which 31.4% had children under the age of 18 living with them, 60.8% were married couples living together, 6.5% had a female householder with no husband present, and 30.1% were non-families. 28.1% of all households were made up of individuals, and 11.1% had someone living alone who was 65 years of age or older. The average household size was 2.42 and the average family size was 2.99.

In the city, the population was spread out, with 26.8% under the age of 18, 4.3% from 18 to 24, 27.3% from 25 to 44, 24.6% from 45 to 64, and 17.0% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 106.7 males. For every 100 females age 18 and over, there were 103.8 males.

The median income for a household in the city was $28,571, and the median income for a family was $31,667. Males had a median income of $22,727 versus $19,500 for females. The per capita income for the city was $14,155. About 3.4% of families and 6.5% of the population were below the poverty line, including 6.6% of those under age 18 and 8.8% of those age 65 or over.