As of the 2020 census, Sanger had a population of 8,839. The median age was 32.9 years. 27.9% of residents were under the age of 18 and 10.5% of residents were 65 years of age or older. For every 100 females there were 98.8 males, and for every 100 females age 18 and over there were 95.7 males age 18 and over.[9]
93.7% of residents lived in urban areas, while 6.3% lived in rural areas.[10]
There were 3,157 households in Sanger, of which 42.1% had children under the age of 18 living in them. Of all households, 53.3% were married-couple households, 16.1% were households with a male householder and no spouse or partner present, and 22.5% were households with a female householder and no spouse or partner present. About 21.2% of all households were made up of individuals and 6.9% had someone living alone who was 65 years of age or older; the census counted 2,055 families in the city.[9]
There were 3,352 housing units, of which 5.8% were vacant. The homeowner vacancy rate was 1.9% and the rental vacancy rate was 8.0%.[9]
Note: NH = Non-Hispanic. The US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos can be of any race.
2010 census
The population in 1980 was 2,574, an increase of 60.6% since 1970. In 1990, the population was 3,508, and the city's population in 2010 was 6,916.
Public education in Sanger is run under the Sanger Independent School District, an independent government. The superintendent of the Sanger public schools is Dr. Sandra McCoy-Jackson. Eight different schools are in Sanger, Texas: Sanger High School, Linda Tutt High School, Sanger Middle School, Sanger 6th Grade Campus, Clear Creek Intermediate School, Butterfield Elementary School, Chisholm Trail Elementary, and Tenderfoot Child Development Center. The new facilities in the Sanger Independent School district are one of the high schools and the new elementary school. The City of Sanger considers the school district a partner of the cities and they work very closely with one another. Sanger ISD has recently introduced a district wide initiative to integrate instructional technology with effective teaching practices. They currently have a 1:1 student technology lending program for grades 8–12 and have increased available technology in all grades across the district.