2020 census As of the
2020 census, 3,718 people, 1,294 households, and 1,110 families resided in the city. The median age was 36.9 years. 27.3% of residents were under the age of 18 and 17.9% of residents were 65 years of age or older. For every 100 females there were 89.5 males, and for every 100 females age 18 and over there were 88.0 males age 18 and over. 0.0% of residents lived in urban areas, while 100.0% lived in rural areas. There were 1,294 households in Cotulla, of which 34.1% had children under the age of 18 living in them. Of all households, 37.9% were married-couple households, 18.9% were households with a male householder and no spouse or partner present, and 34.9% were households with a female householder and no spouse or partner present. About 28.0% of all households were made up of individuals and 12.7% had someone living alone who was 65 years of age or older. There were 1,683 housing units, of which 23.1% were vacant. The homeowner vacancy rate was 1.2% and the rental vacancy rate was 20.0%.
2000 census As of the
census of 2000, 3,614 people, 1,208 households, and 901 families were residing in the city. The
population density was 1,831.8 people per mi2 (708.3/km2). The 1,504 housing units averaged 762.3 per mi2 (294.8/km2). The
racial makeup of the city was 83.45% White, 0.64% African American, 0.39% Native American, 0.50% Asian, 12.67% from other races, and 2.35% from two or more races. Hispanics or Latinos of any race were 83.56% of the population. Of the 1,208 households, 39.0% had children under 18 living with them, 52.7% were married couples living together, 17.8% had a female householder with no husband present, and 25.4% were not families. About 22.6% of all households were made up of individuals, and 11.8% had someone living alone who was 65 or older. The average household size was 2.95, and the average family size was 3.50. In the city, the age distribution was 33.6% under 18, 8.6% from 18 to 24, 24.0% from 25 to 44, 21.3% from 45 to 64, and 12.5% who were 65 or older. The median age was 32 years. For every 100 females, there were 90.2 males. For every 100 females 18 and over, there were 87.2 males. The median income for a household in the city was $23,250 and for a family was $25,951. Males had a median income of $21,199 versus $17,415 for females. The
per capita income for the city was $10,856. About 27.9% of families and 30.1% of the population were below the
poverty line, including 39.0% of those under age 18 and 28.1% of those age 65 or over. Church of Cotulla Church of Cotulla was established in the 1880s. The current sanctuary opened in 1948. ==Law and government==