Derby is located in New Haven County, CT. The population is 12,858, making Derby the 7th largest city in New Haven County.
There are 6 public schools in Derby with an average Homefacts rating of C-. The total crime rate for Derby is low , and there are 21 registered sex offenders residing in the city. Unemployment in Derby is high and the median home sales price is $0. Detailed and up-to-date Derby property reports are available for any property address.