 Today , the courthouse is still used by local government , and has a mailing address of 110 West Washington Street , Hartford City , Indiana . Hartford City 's ZIP code is 47348 . Courtroom facilities on the second floor of courthouse are used by the Blackford County Circuit Court and Blackford County Superior Court . The Blackford County Prosecutor also maintains an office in the building . The Blackford County commissioners meet on the first floor of the courthouse , and the county Clerk ’ s office is also located on that floor . Additional office space is provided in the Blackford County Courthouse Annex , which is located across the street on the west side of the courthouse . The annex has an address of 121 North High Street . Among the offices housed in the annex building are the Blackford County Community Foundation , the Blackford County Emergency Operations Center , and the Blackford County Economic Development Corporation ( including the County Assessor ) . 
