Washington Municipal Government Types: Cities, Towns, and Code Cities

Washington State recognizes three primary classifications of incorporated municipalities — cities, towns, and code cities — each carrying distinct population thresholds, governance authority, and operational powers defined by state statute. Understanding these distinctions matters because the classification a municipality holds determines what ordinances it can pass, how its council is structured, and what services it can legally provide. This page covers the legal definitions, functional mechanics, common classification scenarios, and the decision boundaries that separate one type from another.

Definition and scope

Washington's municipal incorporation framework is governed primarily by Title 35 RCW (covering cities and towns) and Title 35A RCW (the Optional Municipal Code, which governs code cities). The Washington Secretary of State's office maintains the official registry of incorporated municipalities in the state.

Towns are the smallest classification. Under RCW 35.27.010, a town requires a minimum population of 1,500 residents to incorporate. Towns operate under a commission or mayor-council structure with limited statutory authority, and their powers are narrowly defined by the legislature — meaning a town can exercise only those powers explicitly granted to it by statute.

Cities under Title 35 RCW require a minimum population of 1,500 to incorporate and 20,000 to be classified as a "first-class city." Cities have broader authority than towns and may adopt charter governments if they reach the first-class threshold. A first-class city charter allows voters to design the city's own governmental structure, subject to state constitutional limits.

Code cities, established under the Optional Municipal Code (Title 35A RCW), represent the most flexible classification. Any city or town may adopt code city status regardless of population. Code cities exercise broad implied powers — they can act on any subject not specifically prohibited by state law, a principle sometimes described as "liberal construction" of municipal authority. This contrasts sharply with the strict statutory enumeration that constrains traditional cities and towns.

Scope and coverage limitations: This page addresses only Washington State municipal incorporation law as established under Title 35 and Title 35A RCW. It does not address county government structures (covered separately at Washington County Government Structure), special purpose districts (Washington Special Purpose Districts), port authorities (Washington Port Authorities), or federal enclaves within Washington's borders. Tribal governments and federally recognized sovereign nations are entirely outside the scope of state municipal classification law.

How it works

The practical differences among the three types rest on 3 key dimensions: population thresholds, structural options, and scope of powers.

  1. Population thresholds at incorporation
  2. Towns: minimum 1,500 residents (RCW 35.27.010)
  3. Cities (second-class): minimum 1,500 residents (RCW 35.23.021)
  4. Cities (first-class): minimum 20,000 residents, allowing charter adoption (RCW 35.22.010)

  5. Code cities: no separate population floor beyond the base incorporation requirement; any existing city or town may convert

  6. Governance structures available

  7. Towns use a mayor-council form with a 7-member council
  8. Second-class cities use a mayor-council form with a 7-member council
  9. First-class cities may adopt home rule charters with voter-designed structures

  10. Code cities may choose between mayor-council, council-manager, or commission forms under RCW 35A.12 and RCW 35A.13

  11. Scope of powers

  12. Traditional towns and second-class cities: Dillon's Rule applies — authority is limited to what the legislature explicitly grants
  13. Code cities: liberal construction standard under RCW 35A.01.010, allowing action on any matter of local concern not prohibited by statute or the state constitution

Conversion to code city status requires a majority vote of the city council or a ballot measure approved by voters, followed by filing with the county auditor and the Washington Secretary of State.

Common scenarios

A small municipality seeking expanded land-use authority will commonly convert from town or second-class city status to code city status. The conversion unlocks broader zoning and regulatory powers without requiring a population change. Cities in fast-growing counties such as Snohomish County and Clark County have used this pathway to assert more detailed development controls as growth pressure increased.

A community incorporating for the first time with fewer than 20,000 residents typically incorporates as a second-class city or town, then later considers code city conversion as administrative complexity grows. Sammamish, incorporated in 1999, followed a trajectory common to fast-growing suburban communities by organizing under the Optional Municipal Code framework.

A large municipality seeking structural flexibility may pursue first-class city charter status. Seattle, Spokane, and Tacoma are all first-class charter cities, giving their voters authority over the internal design of city government in ways unavailable to second-class or town classifications.

An existing code city choosing its council form will select between mayor-council and council-manager structures at incorporation or by subsequent ordinance. The council-manager form, common in professionally administered mid-size cities, places day-to-day administration under an appointed city manager, while elected officials set policy. Bellevue and Kirkland operate under council-manager structures.

Decision boundaries

The critical distinctions between municipal types come down to 4 decision points:

1. Dillon's Rule vs. liberal construction. Traditional towns and second-class cities can only exercise powers the legislature explicitly grants. Code cities can exercise any power not explicitly prohibited. This single difference drives most conversion decisions and determines how aggressively a municipality can regulate local matters.

2. Charter home rule vs. statutory structure. Only first-class cities with 20,000 or more residents may adopt voter-drafted home rule charters. All other classifications — including code cities — must work within statutory structural options, even if those options are relatively broad under Title 35A.

3. Council-manager availability. The council-manager form is available to code cities under Title 35A but is not available to traditional second-class cities or towns under Title 35. A municipality that wants professional management structure without a home rule charter must convert to code city status.

4. Annexation and boundary review. All three municipal types are subject to boundary review by county boundary review boards (or the county legislative authority in counties without a board) under RCW 36.93. The classification type does not change the annexation review process, though a municipality's planning and service capacity — often tied to its powers — influences boundary review outcomes.

For a broader orientation to how Washington's governmental layers interact, the site index provides navigation to county, state agency, and special district coverage. Residents navigating specific local government questions can also consult the Washington Government Frequently Asked Questions resource for plain-language guidance on jurisdiction and service responsibility.

References

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