Chantilly population of 23,309* population of 23,309 Chantilly, VA Chantilly. Chantilly Chantilly city data population growth Chantilly Chantilly city data Chantilly. Chantilly Chantilly city data City data Chantilly Virginia http://www.city-data.com/city/Chantilly-Virginia.html Chantilly Virginia City Data population of 23,309