skip navigation

Interlocal Cooperation in Law Enforcement

This page provides a basic overview of interlocal cooperation in law enforcement in Washington State, including examples of interlocal agreements between cities, counties, American Indian tribes, or other government agencies.

It is part of MRSC's series on Interlocal Cooperation.


Overview

A city or town may provide law enforcement protection in a number of different ways. The traditional and most common way is to establish a municipal police department under the direction of a locally appointed police chief or marshal.

Counties provide law enforcement through the sheriff's office.

Many local governments enter into contractual arrangements with other jurisdictions to provide law enforcement services. Cities and towns typically contract with counties for police services or with neighboring cities or towns for services. The level of service and cost must be negotiated among jurisdictions. In contracting for police protection, a city or town may opt to appoint a city employee or officer to serve as a chief law enforcement officer, or, as is most typically done, designate an officer from the contracted jurisdiction to serve in that capacity.

Many local governments also enter into mutual aid agreements with other cities, the county, or the state patrol to provide back-up assistance in emergency situations.

This page provides examples of these and other types of agreements entered into by jurisdictions across the state.


Interlocal Cooperation Statutes

  • Ch. 10.93 RCW – Washington Mutual Aid Peace Officers Act
  • RCW 10.93.130 – Authorizing interagency contracting for law enforcement and mutual assistance.
  • Ch. 39.34 RCW – Interlocal Cooperation Act

Examples of Law Enforcement Service Contracts

Below are selected examples of interlocal agreements where one jurisdiction provides general law enforcement services for another.

Counties Providing Law Enforcement Services

Cities Providing Law Enforcement Services


Examples of Mutual Aid Agreements


Examples of Dispatch/Communications Agreements

Below are selected examples of interlocal agreements for emergency communications and dispatch services. For more information on emergency communications, see our page Emergency Communication Services and Facilities.


Examples of Tribal Agreements

A number of cities and counties also have agreements with nearby Indian tribes for a variety of law enforcement services. Selected examples are below. For examples of tribal jail agreements, see our page Jail Services and Alternatives to Incarceration.


Examples of School Resource Officer Agreements


Examples of Regional Task Forces


Examples of Jail Service Agreements

For examples of interlocal agreements related to jails and inmates, see our page Jail Services and Alternatives to Incarceration.


Examples of Court Service Agreements

For examples of interlocal agreements related to court services, including prosecution, public defense, and indigent defense, see our page City and County Court Services.


Examples of Records Management/Software Agreements

For detailed guidance on law enforcement records laws, see our Law Enforcement Records Tool Kit.


Examples of Other Law Enforcement Agreements


Last Modified: June 12, 2025