There were 1,683 households out of which 34.8% had children under the age of 18 living with them, 86.4% were married couples living together, 3.7% had a female householder with no husband present, and 9.0% were non-families. 7.4% of all households were made up of individuals and 3.5% had someone living alone who was 65 years of age or older. The average household size was 2.79 and the average family size was 2.93.
In the city the population was spread out with 25.1% under the age of 18, 3.8% from 18 to 24, 19.3% from 25 to 44, 38.0% from 45 to 64, and 13.7% who were 65 years of age or older. The median age was 46 years. For every 100 females there were 101.2 males. For every 100 females age 18 and over, there were 96.9 males.
The median income for a household in the city was $99,685, and the median income for a family was $101,751. Males had a median income of $72,031 versus $43,750 for females. The per capita income for the city was $45,293. About 1.5% of families and 1.7% of the population were below the poverty line, including 1.3% of those under age 18 and 4.4% of those age 65 or over.
The city of Fair Oaks Ranch is served by the Boerne Independent School District. All students who live in Fair Oaks Ranch attend Fair Oaks Ranch ES(K-6), Boerne Middle School South(7-8) and Boerne Champion High School(9-12)