2020 census

The 2020 United States census counted 102 people, 51 households, and 27 families in Horace.^[12][13] The population density was 416.3 per square mile (160.7/km²). There were 64 housing units at an average density of 261.2 per square mile (100.9/km²).^[13][14] The racial makeup was 78.43% (80) white or European American (76.47% non-Hispanic white), 0.0% (0) black or African-American, 0.0% (0) Native American or Alaska Native, 0.98% (1) Asian, 0.0% (0) Pacific Islander or Native Hawaiian, 8.82% (9) from other races, and 11.76% (12) from two or more races.^[15] Hispanic or Latino of any race was 12.75% (13) of the population.^[16]

Of the 51 households, 25.5% had children under the age of 18; 39.2% were married couples living together; 25.5% had a female householder with no spouse or partner present. 43.1% of households consisted of individuals and 19.6% had someone living alone who was 65 years of age or older.^[13] The average household size was 2.7 and the average family size was 3.3.^[17] The percent of those with a bachelor’s degree or higher was estimated to be 1.0% of the population.^[18]

18.6% of the population was under the age of 18, 4.9% from 18 to 24, 29.4% from 25 to 44, 27.5% from 45 to 64, and 19.6% who were 65 years of age or older. The median age was 43.5 years. For every 100 females, there were 85.5 males.^[13] For every 100 females ages 18 and older, there were 93.0 males.^[13]

The 2016-2020 5-year American Community Survey estimates show that the median household income was $25,357 (with a margin of error of +/- $16,283) and the median family income was $25,893 (+/- $11,233).^[19] Approximately, 23.1% of families and 42.9% of the population were below the poverty line, including 75.0% of those under the age of 18 and 0.0% of those ages 65 or over.^[20][21]

2010 census

As of the census^[22] of 2010, there were 70 people, 33 households, and 22 families residing in the city. The population density was 280.0 inhabitants per square mile (108.1/km²). There were 47 housing units at an average density of 188.0 per square mile (72.6/km²). The racial makeup of the city was 94.3% White, 2.9% African American, and 2.9% from two or more races. Hispanic or Latino of any race were 5.7% of the population.

There were 33 households, of which 30.3% had children under the age of 18 living with them, 54.5% were married couples living together, 9.1% had a female householder with no husband present, 3.0% had a male householder with no wife present, and 33.3% were non-families. 33.3% of all households were made up of individuals, and 3% had someone living alone who was 65 years of age or older. The average household size was 2.12 and the average family size was 2.68.

The median age in the city was 46.6 years. 22.9% of residents were under the age of 18; 4.2% were between the ages of 18 and 24; 15.7% were from 25 to 44; 41.5% were from 45 to 64; and 15.7% were 65 years of age or older. The gender makeup of the city was 47.1% male and 52.9% female.

2000 census

As of the census^[23] of 2000, there were 143 people, 55 households, and 37 families residing in the city. The population density was 592.3 inhabitants per square mile (228.7/km²). There were 66 housing units at an average density of 273.4 per square mile (105.6/km²). The racial makeup of the city was 94.41% White, 0.70% African American, 2.80% from other races, and 2.10% from two or more races. Hispanic or Latino of any race were 15.38% of the population.

There were 55 households, out of which 38.2% had children under the age of 18 living with them, 56.4% were married couples living together, 5.5% had a female householder with no husband present, and 32.7% were non-families. 29.1% of all households were made up of individuals, and 5.5% had someone living alone who was 65 years of age or older. The average household size was 2.60 and the average family size was 3.22.

In the city, the population was spread out, with 31.5% under the age of 18, 6.3% from 18 to 24, 36.4% from 25 to 44, 20.3% from 45 to 64, and 5.6% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 123.4 males. For every 100 females age 18 and over, there were 122.7 males.

The median income for a household in the city was $26,875, and the median income for a family was $43,125. Males had a median income of $30,625 versus $21,250 for females. The per capita income for the city was $15,602. There were 15.6% of families and 20.4% of the population living below the poverty line, including 25.5% of under eighteens and none of those over 64.