in what county is bristow, va?
Homefacts City Report. Bristow is located in Prince William County, VA. The population is NR. There are 4 public schools in Bristow with an average Homefacts rating of A. The total crime rate for Bristow is very low, and there are 8 registered sex offenders residing in the city. Unemployment in Bristow is low and the median home sales price is $358,500.