Waltham is located in Middlesex County, MA. The population is 61,411, making Waltham the 5th largest city in Middlesex County.
There are 10 public schools in Waltham with an average Homefacts rating of C+. The total crime rate for Waltham is low , and there are 21 registered sex offenders residing in the city. Unemployment in Waltham is low and the median home sales price is $0. Detailed and up-to-date Waltham property reports are available for any property address.