Leon Valley is a city in Bexar County, Texas, United States. It is an enclave on the northwest side of San Antonio and is part of the San Antonio-New Braunfels Metropolitan Statistical Area. The population was 10,151 at the 2010 census. Leon Valley is an independent municipality surrounded by the city of San Antonio. Leon Valley was developed in the 1940s as a farming community on Bandera Road between Helotes and San Antonio. In 1952 residents filed a petition  for incorporation as an independent city since the residents did not wish to be annexed by San Antonio. Leon Valley incorporated in 1954 under the leadership of its founding mayor, Raymond Rimkus. In 1960, it had a population of 536 and by 1970 Its population grew to 1,960. In 1990 it had 9,581 people.
At the 2010 census, there were 10,151 people, 4,158 households, and 2,636 families living in the city. The racial makeup of the city was 80.98% White, 3.98% African American, 0.57% Native American, 3.71% Asian, 0.19% Pacific Islander, 8.06% from other races, and 2.51% from two or more races. Hispanic or Latino of any race were 56.22% of the population. Of the 4,158 households 24.22% had children under the age of 18 living with them, 45.98% were married couples living together, 12.70% had a female householder with no husband present, and 36.60% were non-families. 29.89% of households were one person and 11.54% were one person aged 65 or older. The average household size was 2.44 and the average family size was 3.03.
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