The County Attorney, John Coughlin, is a constitutionally elected official and is the chief law enforcement officer in the County. The County Attorney is charged with the prosecution of felonies and misdemeanor appeals from the district courts. The office works in conjunction with the State Attorney General's Office, Sheriff's Department, New Hampshire State Police and local police departments to prosecute crimes committed within Hillsborough County. Hillsborough County is broken down into two districts. Hence, the County Attorney's Office is located in two cities.

The Northern District Office, located in Manchester, is staffed by eleven full time prosecuting attorneys, six full time support staff, three part time support staff, three victim witness advocates, one part time investigator, one paralegal and several legal interns.