what county is mcmechen wv in
Homefacts City Report. Mcmechen is located in Marshall County, WV. The population is 1,509, making Mcmechen the 2nd largest city in Marshall County. There are 1 public schools in Mcmechen with an average Homefacts rating of C. The total crime rate for Mcmechen is very low, and there are 3 registered sex offenders residing in the city.