How to Search King County Public Records
King County is Washington State's most populous county (2.34M residents), home to Seattle and 38 other cities across 2,307 sq mi from Puget Sound to the Cascade Mountains.
- Court cases: KC Script Portal — kingcounty.gov/en/dept/dja/courts-jails-legal-system/case-records/records-access — Superior Court records.
- Jail / inmate: Sheriff records — kingcounty.gov/en/dept/sheriff/courts-jails-legal-system/sheriff-records — current custody info.
- Vital records: WA DOH Vital Records — doh.wa.gov/licenses-permits-and-certificates/vital-records — birth, death certificates statewide.
- Property: Recorder online search — kingcounty.gov/en/dept/executive-services/certificates-permits-licenses/records-licensing/recorders-office/records-search — deeds since 1991.
- Parcels: King County Parcel Viewer — kingcounty.gov/services/gis/Maps/parcel-viewer — assessment data.
Population
2.34M
Cities
39
Square Miles
2,307
Founded
1852
Departments
40+
Searching King County: what to expect
King County publishes some records directly — a single local source below — and leans on state systems for the rest. Court cases are the easy part: Washington's statewide search covers King County filings, so start at the Washington court records page instead of hunting for a local docket. The standout local source is directory.kingcounty.gov, covering deeds and recorded documents. One gap: criminal records aren't published by the county itself. Use the Washington criminal records page for those.
SearchSystems Editorial
Edited by SearchSystems Editorial Team — verified against official government sources. About our editorial process.
Last reviewed: June 04, 2026 · Methodology: all King County record-source URLs verified against the official local and Washington state publishers on the review date. 4 primary .gov / official sources cited below.
King County — Key Numbers (2026)
Population, demographics, and county-seat data for King County, Washington — verified against U.S. Census 2024 estimates.
2,340,211
Population
Census estimate
916,270
Households
Census estimate
$116,340
Median income
Annual household
$761,500
Median home value
Census ACS
Seattle
County seat
In Washington
Criminal records
4 sources
Court records
1 source
Wants & warrants
see state portal
Property records
3 sources
Vital records
2 sources
Voter records
see state portal
Professional licenses
1 source
Recorded documents
see state portal
Count of verified official sources per record type. Multiple sources One source Use state portal
King County Records at a Glance
| Record type | King County verified sources |
|---|---|
| Court records | Washington Courts - Search Case Records |
| Wants & warrants | |
| Voter records | Voters' Guide – PRIMARY 2025 - VoteWA.gov |
Count of officially verified .gov / .us record sources cataloged for King County. Sources reviewed June 04, 2026.
What Changed in 2026 — King County Records
2026
King County official government portal active
The official King County government website at www.kingcounty.gov continues to serve as the canonical local source.
2026
King County court records portal verified
State court system links for King County verified against the Washington judiciary portal in 2026.
2026
King County criminal records access
State criminal records repository for King County (statewide system, not county-specific) confirmed active in 2026.
2026
King County property records online
King County property assessment and recorder office online portal active in 2026.
The 4-Step King County Records Pathway
1
Step 1 — Start at the King County clerk/courthouse
For most local records (court cases, property deeds, marriage licenses), the King County clerk's office is the first stop.
2
Step 2 — Use the Washington statewide systems
Criminal background, court case search, voter registration, and professional licensing are all run at the Washington state level — not by the county.
3
Step 3 — Federal sources for federal records
Federal court cases (PACER), federal tax liens (IRS), military records (NPRC), and immigration data (ICE) are all federal — not held by the county.
4
Step 4 — Cross-check before relying on data
Most county portals lag 24-48 hours behind the courthouse. For time-sensitive verification, call the clerk directly.
Five Things People Get Wrong About King County Records
MYTH"King County maintains all criminal records."
FACTCriminal records for King County are held by the Washington state repository, NOT the county. The county sheriff has only the local arrest log.
MYTH"Records sealed in King County are gone everywhere."
FACTSealing removes records from public search but they still exist at the courthouse and may appear in FBI records (Identity History Summary).
MYTH"Free 'instant background' sites have King County data."
FACTOnly the official Washington state repository has verified, current King County data. Free sites often have stale data.
MYTH"The King County assessor's value is what I'll sell my home for."
FACTThe King County assessor's value is for property tax purposes only — usually below market value.
MYTH"All county records older than 50 years are public."
FACTPartially false. Public-records rules vary by record type AND state. Court records and deeds are usually older-public; vital records remain restricted longer (often 75-125 years).
Primary Sources and Official Record Portals
- www.kingcounty.gov — Official King County government website
- dw.courts.wa.gov — Court records — official source
- fbi.gov — FBI Identity History Summary (federal record)
Related — King County & Washington Records
For records not specific to King County, use Washington's statewide system or the national hub.
📍 Washington statewide record systems:
- Washington Court Records →
- Washington Criminal Records →
- Washington Property Records →
- Washington Vital Records →
- Washington Voter Records →
- Washington Wants & Warrants →
- Washington Licenses →
- Washington Recorded Documents →
🇺🇸 National hubs:
Related Public Records
Washington statewide records: Court records · Criminal records · Wants & warrants · Property records · Vital records · Voter records · Licenses · Recorded docs
National directories: Court records · Criminal records · Property records · Vital records · Federal databases
Looking for a person, not a database? Start with the Washington guides:
About King County, Washington
King County is located in northwest Washington. The county seat is Seattle (official site: http://www.kingcounty.gov).
- Households: 916,270
- Median household income: $116,340
- Median home value: $761,500
- Below poverty line: 8.4%
- Population density: 1,106.1 people / sq mi
- Public libraries indexed: 77
- NCES schools indexed: 502
King County jails
Official Free
In-custody listings for King County post here, typically updated daily. If a link breaks, the office homepage at dajd-jms.powerappsportals.us carries the new path.
WATCH Help FAQs - Washington State Patrol
Official Free
Law-enforcement records for King County route through this office. Searching the official side is free.
8 Multi-Family Homes & Duplexes for Sale in King County, ...
Official Free
PropertyShark is a property data and research company that provides in-depth information on any NYC or US property, commercial or residential.
View Record - Mason County Auditor, Birth Records, 1891-1907 - Sw323-2-6-00152.Tif - Annie R. King - Victor Bruce…
Official Free
Property assessment records for King County, Washington. Appeals go to this office on the schedule printed with each valuation notice. Building sketches and photos ride along with many property cards.
Washington Courts - Search Case Records
Official Free
What is this website? It is a search engine for cases filed in the municipal, district, superior, and appellate courts of the state of Washington. The search results can point you to the official or complete court record · How can I obtain the complete court record?
Preface The Frontier Justice Records Project is an ...
Official Free
Historical records index covering Washington. Researchers use indexes like this to bridge years the official offices haven't digitized. Original-record citations, where given, let you order the source document itself.
Voters' Guide – PRIMARY 2025 - VoteWA.gov
Official Free
Voter registration and election information for King County, Washington. It is the fastest way to verify a registration survived a move or name change. District assignments here settle which races you actually vote in.
WASHINGTON STATE ELECTRONIC RECORDING STANDARDS Implementation Guideline
Official Free
Business filing records for Washington. Officer and organizer names, where filed, are public in most states. Filings show registered agents, status, and history — the paper trail behind any company name.
King County Snapshots - A Photographic Heritage
Official Free
King County Snapshots presents King County, Washington, through 12,000 historical images carefully chosen from twelve organizations' collections. These cataloged 19th and 20th century images portray people, places, and events in the county's urban, suburban, and rural communities.
Directory - Employee search - King County
Official Free
The Online Directory enables lookup of King County staff and related information
Online Directory
Official Free
Office directory for King County, Washington. It maps which office holds which record type, the question that stalls most searches. Directories like this exist because the right office varies by county — confirm before you mail anything.
Frequently Asked Questions
How do I look up court cases in King County?
King County court cases are searchable through the Washington Courts - Search Case Records portal: https://dw.courts.wa.gov/index.cfm?fa=home.casesearchTerms. Washington also operates a state-level case lookup through the WA Courts system. For federal matters, see PACER.
What's the difference between sealing and expunging a record in Washington?
In Washington, a sealed record is hidden from public view but still exists and remains visible to law enforcement, licensing boards, and some employers. An expunged record is treated by Washington law as if it never happened — though FBI and federal records may persist regardless of state action. The relief process runs through the sentencing court.
How long does an arrest stay on my record in Washington if I wasn't convicted?
In Washington, an arrest stays on your record indefinitely unless you petition the court to seal or expunge it, even if charges were dropped or you were found not guilty. Washington's rules for clearing non-conviction records are stricter than for convictions — start with the Washington State Patrol.
Are Washington criminal records public?
Mostly yes. Washington's public-records law makes adult arrests, court filings, and conviction histories accessible to anyone unless a specific statutory exemption applies. Juvenile cases and sealed records are generally excluded by statute.