Petersburg Borough, Alaska

Petersburg Borough is a borough in the U.S. state of Alaska. According to Census Bureau estimates, the population was 3,196 in 2016. The borough seat is Petersburg. Petersburg is the most recently created county equivalent in the United States.
The borough was incorporated in 2013, it took area from the Hoonah–Angoon Census Area and the former Petersburg Census Area. The remaining part of Petersburg Census Area (including Kake) was added to Prince of Wales–Hyder Census Area. It was created in 2008 from the remaining part of Wrangell–Petersburg Census Area upon the incorporation of the City and Borough of Wrangell.