Идалу қаласының демографиялық құрамы (2020)

+Idalou racial composition (NH = Non Hispanic)RaceNumberPercentageWhite (NH)1,17453.53%Black or African American (NH)150.68%Native American or Alaska Native (NH)10.05%Asian (NH)50.23%Mixed/Multi Racial (NH)391.78%Hispanic or Latino95943.73%Total2,193
As of the 2020 United States census, there were 2,193 people, 736 households, and 466 families residing in the city.

As of the census of 2000, 2,157 people, 796 households, and 593 families resided in the city. The population density was The 851 housing units averaged 868.6 per square mile (335.3/km). The racial makeup of the city was 70.00% White, 0.60% African American, 0.70% Native American, 0.14% Asian, 0.14% Pacific Islander, 26.94% from other races, and 1.48% from two or more races. Hispanics or Latinos of any race were 42.98% of the population. Of the 796 households, 36.8% had children under the age of 18 living with them, 60.1% were married couples living together, 10.7% had a female householder with no husband present, and 25.4% were not families. About 24.2% of all households were made up of individuals, and 12.8% had someone living alone who was 65 years of age or older. The average household size was 2.71 and the average family size was 3.22. In the city, the population was distributed as 29.3% under the age of 18, 7.8% from 18 to 24, 25.5% from 25 to 44, 23.3% from 45 to 64, and 14.0% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 87.6 males. For every 100 females age 18 and over, there were 82.6 males. The median income for a household in the city was $34,167, and for a family was $39,766. Males had a median income of $29,556 versus $20,150 for females. The per capita income for the city was $14,664. About 10.2% of families and 11.2% of the population were below the poverty line, including 12.2% of those under age 18 and 10.9% of those age 65 or over.

Idalou is served by the Idalou Independent School District.

The town is depicted in the song "Idalou" by the Josh Abbott Band, from the album Small Town Family Dream (2012). It's also featured in the song "Amarillo Highway (for Dave Hickey)" by Terry Allen on the album Lubbock (on everything) (1979), in the opening lyric, "Well, I'm a high straight in Plainview, side bet in Idalou, and a fresh deck in New Deal."