2020 census As of the
2020 census, Carthage had a population of 127. The median age was 47.3 years. 21.3% of residents were under the age of 18 and 33.9% of residents were 65 years of age or older. For every 100 females there were 95.4 males, and for every 100 females age 18 and over there were 88.7 males age 18 and over. There were 65 households in Carthage, of which 23.1% had children under the age of 18 living in them. Of all households, 35.4% were married-couple households, 29.2% were households with a male householder and no spouse or partner present, and 30.8% were households with a female householder and no spouse or partner present. About 47.7% of all households were made up of individuals and 38.4% had someone living alone who was 65 years of age or older. of 2010, there were 144 people, 80 households, and 37 families residing in the city. The
population density was . There were 136 housing units at an average density of . The racial makeup of the city was 96.5%
White, 0.7%
Asian, and 2.8% from two or more races. There were 80 households, of which 15.0% had children under the age of 18 living with them, 36.3% were
married couples living together, 8.8% had a female householder with no husband present, 1.3% had a male householder with no wife present, and 53.8% were non-families. 46.3% of all households were made up of individuals, and 21.3% had someone living alone who was 65 years of age or older. The average household size was 1.80 and the average family size was 2.46. The median age in the city was 52.3 years. 16% of residents were under the age of 18; 5.7% were between the ages of 18 and 24; 18.2% were from 25 to 44; 34.7% were from 45 to 64; and 25.7% were 65 years of age or older. The gender makeup of the city was 50.7% male and 49.3% female.
2000 census At the 2000
census, there were 187 people, 98 households and 52 families residing in the city. The population density was . There were 143 housing units at an average density of . The racial makeup of the city was 98.93%
White, and 1.07% from two or more races. There were 98 households, of which 14.3% had children under the age of 18 living with them, 49.0% were
married couples living together, 4.1% had a female householder with no husband present, and 46.9% were non-families. 43.9% of all households were made up of individuals, and 28.6% had someone living alone who was 65 years of age or older. The average household size was 1.91 and the average family size was 2.63. Age distribution was 16.0% under the age of 18, 6.4% from 18 to 24, 16.0% from 25 to 44, 26.2% from 45 to 64, and 35.3% who were 65 years of age or older. The median age was 51 years. For every 100 females, there were 98.9 males. For every 100 females age 18 and over, there were 84.7 males. The median household income was $27,679, and the median family income was $32,917. Males had a median income of $26,750 versus $15,938 for females. The
per capita income for the city was $15,100. About 13.2% of families and 17.4% of the population were below the
poverty line, including 40.0% of those under the age of eighteen and 12.1% of those 65 or over. ==Notable people==