The Revised Code of Washington, usually shortened to the RCW, is the official compilation of every permanent law currently in force in Washington State, organized by subject so you can actually find what you need.1Washington State Legislature. Revised Code of Washington It gathers the statutes the legislature has passed and the governor has signed, along with laws voters approved through the initiative process.2Washington State Legislature. Help With State Laws If you want to know the penalty for a traffic offense, how a business license works, or what rights a tenant has, the answer lives in the RCW.
What the RCW Contains, and What It Doesn’t
The RCW holds session laws arranged by topic, with amendments folded in and repealed laws stripped out over time.1Washington State Legislature. Revised Code of Washington Temporary measures like budget appropriations are left out because they lack the long-term applicability required for codification.3Washington State Law Library. Revised Code of Washington Laws designed to expire or apply to a single fiscal cycle stay in the session laws but never make it into the permanent code.
Two related sources sit next to the RCW and are easy to confuse with it. The Washington Administrative Code (WAC) contains rules created by state agencies under authority the statutes give them, so the RCW is the “what” and the WAC is the “how.”4Washington State Legislature. State Laws and Rules A statute might say restaurants must meet certain health standards; the WAC spells out the temperature a refrigerator has to hold. Local city and county ordinances are a third layer entirely and do not appear in the RCW, though they cannot conflict with it.
How RCW Citations Are Numbered
Every RCW citation follows a three-level system: Title, Chapter, Section, written as three numbers separated by periods.5Washington State Legislature. Revised Code of Washington Volume 3 Preface RCW 46.61.502 means Title 46, Chapter 61, Section 502. Titles cover broad subject areas: Title 46 covers Motor Vehicles,6Justia. 2025 Revised Code of Washington Title 46 – Motor Vehicles and Title 9A is the Washington Criminal Code.7Washington State Legislature. Title 9A RCW – Washington Criminal Code Chapters break each Title into narrower topics, and sections contain the actual text of the law, including definitions, requirements, and penalties.
The section number is a true decimal, which lets the Code Reviser slot new sections between existing ones by adding digits rather than renumbering the whole chapter.5Washington State Legislature. Revised Code of Washington Volume 3 Preface That’s why you’ll see section numbers like .502 sitting next to .5055. Nobody made a typo; the system is designed to grow.
How to Search the RCW Online
Start at the Washington State Legislature’s official site, leg.wa.gov, which hosts the authoritative online version of the RCW. The site offers a keyword search where you can type a topic, phrase, or statute number, and a full table of contents you can browse through Titles and Chapters. Browsing is useful when you know the general area but not the exact section. If your question involves landlord-tenant law, for instance, you can navigate to Title 59 and scan the chapter list.
When you pull up a statute, watch for alerts noting that the section has been recently amended or is scheduled for repeal. The online code is updated twice a year: once in early fall after the legislative session wraps up, and again at year’s end if any ballot measures changed the law.1Washington State Legislature. Revised Code of Washington During the gap between a law passing and the code being updated, the session law itself is the controlling text, so if you’re researching something that just passed, check the session laws page rather than waiting.8Washington State Legislature. Session Laws Third-party databases like Justia also publish the RCW and are fine for cross-referencing, but the legislature’s own site is what courts rely on.
Reading an RCW Section: A Worked Example
Take RCW 46.61.502, Washington’s DUI statute. The citation places it in Title 46 (Motor Vehicles), Chapter 61, Section 502. The statute defines driving under the influence to include operating a vehicle with a blood alcohol concentration of 0.08 or higher, a THC concentration of 5.00 or higher, or while impaired by any drug.9Washington State Legislature. RCW 46.61.502 – Driving Under the Influence
A first-offense DUI is a gross misdemeanor, which under Washington law carries up to 364 days in jail, a fine of up to $5,000, or both.10Washington State Legislature. RCW 9A.20.021 – Maximum Sentences for Crimes Committed July 1, 1984, and After The same statute escalates the offense to a Class B felony if the person has three or more prior offenses within 15 years or a prior conviction for vehicular homicide or vehicular assault while impaired.9Washington State Legislature. RCW 46.61.502 – Driving Under the Influence One statute, two very different outcomes based on history, and every cross-referenced section is a click away.
When a New Law in the RCW Takes Effect
Most new laws don’t take effect the day the governor signs them. Under the Washington State Constitution, any law subject to referendum cannot take effect until 90 days after the legislative session adjourns. For the 2026 session, that 90-day effective date falls on June 11, 2026.11Washington State Legislature. Latest Session Documents
The exception is the emergency clause. When the legislature declares a bill necessary for the immediate preservation of public peace, health, or safety, the law takes effect as soon as the governor signs it. You can spot these because the bill text includes explicit emergency language. Some statutes also set their own effective date, such as January 1 of the following year, and when a statute names its own date, that date controls.
Where the RCW Sits in the Legal Hierarchy
The RCW is powerful but not supreme. The Washington State Constitution establishes the government’s structure and powers, and any statute that conflicts with it can be struck down.12Washington State Legislature. Washington State Constitution Above the state constitution sits the U.S. Constitution, which Article I, Section 2 of Washington’s constitution recognizes as the supreme law of the land.13Washington State Legislature. Washington State Constitution – Section 2 Supreme Law of the Land
Below the RCW sit agency rules (the WAC) and local ordinances. State law can preempt local regulation on specific topics, meaning a city or county cannot pass a stricter or inconsistent rule in that area. Firearms are the clearest example: the state has fully occupied the field, and any local law that is inconsistent with or more restrictive than state law is preempted.14Washington State Legislature. RCW 9.41.290 – State Preemption When federal law conflicts with the RCW, federal law prevails under the Supremacy Clause.
History Notes at the End of a Section
Most RCW sections end with a bracketed block tracing the law’s legislative history. These notes list every session law that contributed to the current text, abbreviated by year and chapter number.15Seattle University School of Law Library. Washington Legislative History – Basic Steps A reference like “1891 c 23 § 1” means Section 1, Chapter 23, Laws of 1891.16Gonzaga University School of Law. Historical and Archived Washington Statutory Codes Multiple entries mean the law has been amended more than once, and you can trace the changes session by session.
These notes matter when the version of a law in effect on a particular date is what you need. If a statute was amended in 2019 but the events you’re researching happened in 2017, the pre-amendment text is what controls, and the history note points you to the exact session law to pull. Section captions and table-of-contents headings that appeared in the original bills are not themselves part of the law.
Accessing the RCW in Person
If you’d rather work with physical volumes, Washington has a built-in option. County law libraries, established under Chapter 27.24 of the RCW, exist across the state, and most provide access to basic Washington legal research materials, including the Revised Code of Washington.17King County Law Library. Washington Association of County Law Libraries Every county with a population of 8,000 or more is required to maintain one.
At least 34 of these libraries are open to the public, though hours vary and the amount of staff help you can get depends on funding. Judges, state and county officials, and bar association members can use any county law library for free, and residents in counties with a population of 300,000 or more also get free access. If you want to sit down with the code volumes and ask a librarian for pointers, a county law library is where to go.