what county is montross va in?
Homefacts City Report. Montross is located in Westmoreland County, VA. The population is 549, making Montross the 2nd largest city in Westmoreland County. There are 2 public schools in Montross with an average Homefacts rating of C-. there are 12 registered sex offenders residing in the city. Unemployment in Montross is moderate and the median home sales price is $0.