Matanuska-Susitna Borough: Government and Community Planning

The Matanuska-Susitna Borough (Mat-Su) is the second-largest borough by land area in Alaska and among the fastest-growing jurisdictions in the state, creating sustained pressure on land use planning, infrastructure, and service delivery frameworks. This page covers the borough's governmental structure, planning authority, jurisdictional scope, and the decision boundaries that govern land use, zoning, and community development within its approximately 24,683 square miles. Understanding how borough government functions is essential for property owners, developers, municipal entities, and policy professionals operating in the Mat-Su region.

Definition and scope

The Matanuska-Susitna Borough is a second-class borough incorporated under Alaska state law (Alaska Statutes Title 29). Second-class borough status defines a specific tier of local governmental authority — one that holds mandatory powers over areawide planning, platting, and taxation but does not automatically exercise all optional powers available to first-class boroughs or unified home-rule municipalities such as the Municipality of Anchorage.

The borough seat is Palmer. The borough encompasses two incorporated first-class cities — Palmer and Wasilla — as well as unincorporated communities including Talkeetna, Big Lake, Houston, and Sutton. These incorporated cities, City of Palmer and City of Wasilla, retain their own municipal governments and exercise powers not assumed by or in conflict with borough authority.

The borough's geographic scope covers the Matanuska and Susitna river valleys, extending north toward Denali Borough and south toward the Kenai Peninsula Borough. Population figures from the U.S. Census Bureau's 2020 decennial census placed the borough population at approximately 108,317 residents, making it the third most populous jurisdiction in Alaska behind the Municipality of Anchorage and the Fairbanks North Star Borough.

Scope boundary: This page covers governmental structure and planning authority within the Matanuska-Susitna Borough as defined by Alaska Title 29. It does not address tribal governance exercised by Alaska Native entities within or adjacent to borough boundaries — those structures operate under a separate federal and state framework described under Alaska Native Tribal Governments. Borough authority does not extend to federal lands administered by the Bureau of Land Management or U.S. Forest Service within the geographic boundary. State agency jurisdiction — including the Alaska Department of Transportation over the Glenn and Parks highways — overlaps with but is not superseded by borough planning codes.

How it works

Borough government in Mat-Su operates through an elected assembly and an elected mayor. The Mat-Su Borough Assembly consists of 9 members serving three-year staggered terms, elected by district. The mayor serves a three-year term and functions as the chief executive officer, distinct from a borough manager role that handles day-to-day administration.

Planning and land use regulation proceed through the following primary mechanisms:

  1. Comprehensive Plan adoption — The borough adopts and periodically updates a long-range comprehensive plan establishing land use designations, growth policy, and infrastructure priorities across the areawide jurisdiction.
  2. Zoning ordinances — The borough's Planning Department administers the Matanuska-Susitna Borough Code, Title 17, which governs zoning districts, permitted uses, conditional uses, and variance procedures for unincorporated areas.
  3. Platting authority — Areawide platting authority applies across the entire borough, including within Palmer and Wasilla, meaning subdivision plats must receive borough Planning Commission approval regardless of whether land falls inside or outside city limits.
  4. Capital improvement planning — The borough budget process, aligned with state processes described under the Alaska State Budget Process, incorporates a Capital Improvement Plan (CIP) covering road maintenance, school construction, and utility infrastructure.
  5. Assembly ordinances and resolutions — Legislative action at the assembly level authorizes taxing authority, bond measures, and amendments to borough code.

The borough provides school district services through the Matanuska-Susitna Borough School District, which operated 50 schools serving approximately 19,300 students as of district records cited by the Alaska Department of Education and Early Development. Education funding flows through state formulas administered by that department, with the borough contributing through local property tax levies.

Common scenarios

Planning and governmental decisions in Mat-Su Borough most frequently involve:

Decision boundaries

The distinction between borough areawide authority and city authority is the primary decision boundary in Mat-Su governance. The following framework applies:

Borough-only authority (areawide):
- School district administration and taxation
- Platting across all lands within borough boundaries
- Areawide property assessment and taxation
- Comprehensive land use planning

Concurrent or city-primary authority:
- Building permitting within Palmer and Wasilla city limits (administered by respective city building departments)
- Local road maintenance within city boundaries
- City police services (Mat-Su Borough does not operate a separate borough-wide police force; unincorporated areas are served by the Alaska Department of Public Safety through Alaska State Troopers)

Outside borough authority:
- Federal land management decisions on BLM or National Forest parcels
- State highway design, construction, and right-of-way within the borough
- Tribal land use and governance on Alaska Native allotments or trust lands

A comparison relevant to planning professionals: in a first-class borough such as Kenai Peninsula Borough, the borough exercises broader optional powers including greater flexibility in assuming municipal functions. Mat-Su's second-class status means optional service functions require affirmative assembly action and, in some cases, voter approval before the borough can assume them.

The Alaska Boroughs Overview page on this reference network provides the statutory framework common to all organized boroughs, and the Alaska Government in Local Context page situates borough authority within Alaska's broader intergovernmental structure. The primary resource index at /index provides access to the full range of Alaska governmental reference pages available in this network.

References