Montclair is a census-designated place (CDP) in Prince William County, Virginia, United States.

[3] An affluent residential community surrounding a man-made lake and golf course, development began in the late 1960s and new home construction ended during the 1990s.

Several events are held at Dolphin Beach throughout the year with food, live music, and other family-friendly activities.

Most citizens who live in Montclair are currently represented in Virginia's House of Delegates by Democrat Elizabeth Guzmán.

Redistricting split the community into two districts and a small portion of Montclair is represented by Luke Torian.