Mason County Criminal Records

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Use the official court, custody, police-record, and statewide paths for Mason County, Washington; jurisdiction limits are explained.

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Searches are compiled from court, county, and statewide public-record sources.

Mason County public records: common questions

Where to search Mason County records

Mason County, Washington court, custody, police, and statewide records are kept in separate systems. Start court research with Washington Courts official Mason County Superior Court local rules. Use Washington State Courts directory for Mason County Superior, District, Juvenile, Probation, County Clerk, and Shelton Municipal Courts for the state-level path described in this guide.

Court casesWashington Courts official Mason County Superior Court local rules
Current custodyConfirm the current jail or detention source with the local agency.
Statewide recordsWashington State Courts directory for Mason County Superior, District, Juvenile, Probation, County Clerk, and Shelton Municipal Courts
Federal recordsFederal court and custody records are outside county systems and require a separate federal search.

Verified local details

These details were drawn from the official sources linked in this guide. Reconfirm addresses, contacts, schedules, fees, and other time-sensitive details with the responsible agency.

Mason County Superior Court is located at 419 North 4th Street, second floor, in Shelton, Washington.
Mason County District Court is located at 414 West Franklin Street in Shelton, and the Washington Courts directory lists 360-427-9670 extension 339 as its phone contact.
Mason County Juvenile Court is located at 426 West Cedar Street in Shelton.
Shelton operates a municipal court at the Shelton Civic Center, 525 West Cota Street.
Mason County Superior Court local rules include civil, criminal, juvenile, family-law, probate, guardianship, adoption, mediation, and guardian ad litem provisions.

Mason County official record-source actions
Record type	Agency or source	Scope	Action	Last checked
Court cases	Washington Courts official Mason County Superior Court local rules	County or local	Open source	August 19, 2026
Statewide records	Washington State Courts directory for Mason County Superior, District, Juvenile, Probation, County Clerk, and Shelton Municipal Courts	State	Open source	August 20, 2026
Court cases	Mason County official source (courts.wa.gov)	County or local	Open source	August 18, 2026

How this guide is maintained: This matrix only republishes government and agency destinations supported by the researched guide or its reviewed county source registry. Page updated August 24, 2026. Agency sites and coverage can change, so confirm current rules with the source. Read our county source-review and correction policy.

A useful Mason County records search depends on matching the record to the right custodian. Use the questions below for a fast orientation, then follow the linked court, jail, police, and statewide sources for the authoritative record. Mason County has 71,165 residents (2025 estimate). The source map below identifies the relevant local courts and agencies. Offices and online systems change, so confirm details with the agency before relying on a record.

Quick facts

County-equivalent identity: 53-045
Population: 71,165 residents (2025 estimate)
Local detail: Mason County Superior Court is located at 419 North 4th Street, second floor, in Shelton, Washington.
Local detail: Mason County District Court is located at 414 West Franklin Street in Shelton, and the Washington Courts directory lists 360-427-9670 extension 339 as its phone contact.
Local detail: Mason County Juvenile Court is located at 426 West Cedar Street in Shelton.
Local detail: Shelton operates a municipal court at the Shelton Civic Center, 525 West Cota Street.
Local detail: Mason County Superior Court local rules include civil, criminal, juvenile, family-law, probate, guardianship, adoption, mediation, and guardian ad litem provisions.

What is specific about this local guide

Local detail: Mason County Superior Court is located at 419 North 4th Street, second floor, in Shelton, Washington.
Local detail: Mason County District Court is located at 414 West Franklin Street in Shelton, and the Washington Courts directory lists 360-427-9670 extension 339 as its phone contact.
Local detail: Mason County Juvenile Court is located at 426 West Cedar Street in Shelton.

How can someone check whether a person is in the Mason County Jail?

The approved official source set for Mason County does not document a dedicated live inmate locator. Contact the county detention agency directly because local custody can change throughout the day.

How can I contact Mason County Superior Court, District Court, Juvenile Court, or the County Clerk?

Mason County Superior Court handles superior-court matters, while Mason County District Court handles limited-jurisdiction matters. Juvenile Court and Probation Services are separately listed, and local Superior Court rules govern county-specific procedures. Check Washington State Courts directory for Mason County Superior, District, Juvenile, Probation, County Clerk, and Shelton Municipal Courts to confirm the filing court, venue, and case type before relying on a search.

Which Mason County court handles a civil, criminal, family, probate, juvenile, or traffic matter?

Mason County Juvenile Court is located at 426 West Cedar Street in Shelton. Check Washington State Courts directory for Mason County Superior, District, Juvenile, Probation, County Clerk, and Shelton Municipal Courts to confirm the filing court, venue, and case type before relying on a search.

Where is Shelton Municipal Court located and how is it different from Mason County District Court?

Shelton has a separate municipal court at the Shelton Civic Center. Municipal-court and municipal-police jurisdiction may differ from Mason County District Court and Sheriff jurisdiction depending on the location and charge. Use Washington State Courts directory for Mason County Superior, District, Juvenile, Probation, County Clerk, and Shelton Municipal Courts as one official starting point, then confirm each requested record system with its responsible custodian.

How can a Mason County inmate access legal counsel, the law library, or court records?

No reviewed official source for Mason County establishes a case-specific court search or document-request procedure. Open Washington Courts official Mason County Superior Court local rules for the court's current case-search and document-access instructions.

What inmate records does the Mason County Sheriff’s Office maintain?

The approved official source set for Mason County does not document one system covering every requested record type. Identify the office that created the record and confirm its current access instructions directly.

What Mason County Superior Court local rules apply to family law, probate, mediation, or criminal cases?

Mason County Superior Court local rules include rescinded provisions and should be checked against the current court schedule and orders. Open Washington Courts official Mason County Superior Court local rules for the court's current case-search and document-access instructions.

Which county, municipal, state, or tribal agency has jurisdiction for an incident in Mason County?

Shelton has a separate municipal court at the Shelton Civic Center. Municipal-court and municipal-police jurisdiction may differ from Mason County District Court and Sheriff jurisdiction depending on the location and charge. Use Washington State Courts directory for Mason County Superior, District, Juvenile, Probation, County Clerk, and Shelton Municipal Courts to confirm the responsible law-enforcement agency before requesting a record.

Municipal courts and other local systems

Use Washington State Courts directory for Mason County Superior, District, Juvenile, Probation, County Clerk, and Shelton Municipal Courts for a local or municipal court path. Custody: The Mason County Sheriff’s Office maintains the Mason County Jail and inmate records, including booking, confinement, court-appearance, visitation, and telephone records. The reviewed sources do not establish a current public live custody roster. Municipal: Shelton has a separate municipal court at the Shelton Civic Center. Municipal-court and municipal-police jurisdiction may differ from Mason County District Court and Sheriff jurisdiction depending on the location and charge.

Local cities and separate court systems

The relevant local courts and agencies may serve different incorporated municipalities, so confirm the filing locality before relying on a record.

Mason County court and felony records

Start with Washington Courts official Mason County Superior Court local rules for the official Mason County court path. County: Mason County’s Sheriff and county court services operate within Mason County; the reviewed official sources do not provide a complete county boundary or law-enforcement coverage map. Court: Mason County Superior Court handles superior-court matters, while Mason County District Court handles limited-jurisdiction matters. Juvenile Court and Probation Services are separately listed, and local Superior Court rules govern county-specific procedures.

Police records and public-record requests

Request a police or incident record from the sheriff or municipal police agency that created it. The Washington Courts directory provides court locations and contacts but does not determine law-enforcement jurisdiction for a specific incident.

Washington state-level record sources

Statewide Washington sources are separate from Mason County local records. Do not treat a statewide search as a complete county docket, jail roster, or police-record database.

Official Mason County and Washington record sources

For an official starting point, use Washington Courts official Mason County Superior Court local rules. Confirm current access rules, fees, contacts, and jurisdiction with the responsible agency.

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Prefer an official source? For an official starting point, use Washington Courts official Mason County Superior Court local rules. Confirm current access rules, fees, contacts, and jurisdiction with the responsible agency.

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