Alaska
Buying Land in Petersburg Borough, Alaska
Petersburg Borough is one of Alaska's youngest organized boroughs, formed in 2013 when the former City of Petersburg dissolved into a full borough government. Nearly all of its land base -- all of Kupreanof Island and most of Mitkof Island -- sits inside the Tongass National Forest, and its economy still runs on Alaska's largest halibut fishing fleet and a waterfront shaped by Norwegian settlers.
A borough only about a decade old
Petersburg Borough is a genuinely young local government by Alaska standards. The City of Petersburg dissolved on January 3, 2013 in favor of incorporating the Petersburg Borough, extending organized local government (with its planning, zoning, and taxing authority) out from the former city limits to cover the broader roughly 3,829-square-mile area, including all of Kupreanof Island and most of Mitkof Island. For a buyer researching this area, that recency matters practically: any pre-2013 reference to "the City of Petersburg's" zoning code, service area, or tax structure may not describe the current borough-wide framework, so confirm current rules directly with the borough's Community Development Department rather than an older municipal source.
Land base: overwhelmingly Tongass National Forest
The single most important land-status fact for this borough is how much of it is federal forest, not private or state land. The entire island of Kupreanof falls within the Petersburg Ranger District of the Tongass National Forest -- the nation's largest national forest, spanning roughly 16.7 million acres across Southeast Alaska -- and much of Mitkof Island, where the community of Petersburg itself sits, is also managed as national forest. Private, buildable land is genuinely limited to a comparatively small footprint around the city of Petersburg and a handful of other developed areas. Any land search here should start by confirming whether a specific parcel sits on private or borough-owned land versus national forest, since Tongass land generally is not available for ordinary private purchase and any use of it runs through a separate federal permitting process with the U.S. Forest Service.
Kupreanof stayed separate -- confirm which government actually applies
Not every community inside the borough's boundaries chose to merge into it. The small City of Kupreanof, located across the Wrangell Narrows from Petersburg on Kupreanof Island, remained an independently incorporated city rather than dissolving into the new borough government in 2013 -- a distinct governmental status from Petersburg's own history. A land buyer looking at a parcel in or near Kupreanof should confirm directly whether it falls inside that city's limits (with its own, separate zoning and permitting authority) or in the surrounding unincorporated borough land, since the two are not the same jurisdiction despite both being part of the wider Petersburg Borough for census and regional purposes.
A fishing-fleet economy shapes the waterfront's zoning
Petersburg was founded around 1897 by Norwegian immigrant Peter Buschmann, who built a cannery using ice from the nearby LeConte Glacier, and the town retains a strong Norwegian identity today, visible even in the rosemaling decoration on many homes. More practically for land use, Petersburg is home to Alaska's largest halibut fishing fleet, and its working waterfront along the Wrangell Narrows channel is lined with docks, canneries, and cold-storage plants -- reflected directly in the borough's zoning code, which maintains a specific Marine Industrial Overlay Zone subdistrict governing tideland and waterfront-industrial uses. The borough's 2026 rezoning of a waterfront parcel to Tideland Industrial (I-1) status under that overlay (Ordinance #2026-04) shows this working-waterfront zoning is actively managed and adjusted, not a static legacy designation -- confirm current waterfront zoning directly for any parcel near the harbor or Wrangell Narrows.
Who to Call Before Buying Land in Petersburg Borough
Petersburg Borough's Community Development Department handles both zoning/land-use and building permitting under one office. The separately incorporated City of Kupreanof maintains its own, distinct city government for parcels within its limits.
Planning & Zoning
Petersburg Borough -- Community Development Department
Confirming a parcel's current Title 19 zoning district, any applicable overlay (such as the Marine Industrial Overlay Zone), and building-permit requirements.
Other
U.S. Forest Service -- Petersburg Ranger District, Tongass National Forest
Any land-use question on national forest land, which covers all of Kupreanof Island and much of Mitkof Island within the borough.
Septic / Onsite Wastewater
Alaska Department of Environmental Conservation (ADEC) -- Wastewater Program
Septic system permitting and site evaluation, handled statewide by ADEC rather than a local health department.
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Get local guidanceSources
- ADOPTION OF ORDINANCE #2026-04 — City and Borough of Petersburg, Alaska (accessed 2026-09)
- Petersburg Borough, Alaska — Wikipedia (accessed 2026-09)
- Kupreanof, Alaska — Wikipedia (accessed 2026-09)
- Mitkof Island — Wikipedia (accessed 2026-09)
- Building Permits, Land Use, Mapping, Planning — City and Borough of Petersburg, Alaska (accessed 2026-09)
- Alaska's Land of Second Sons: Petersburg in profile — National Fisherman (accessed 2026-09)
- Petersburg Alaska: commercial fishing hub, halibut capital with Norwegian Heritage — mvdocktails.com (accessed 2026-09)
- Onsite Wastewater Systems — Alaska Department of Environmental Conservation (accessed 2026-09)
Last reviewed 2026-09