The KC-Clerk's public portal provides King County Superior Court case number and participant name search functionality and access to case information. Accessible cases include civil, criminal, family law, probate, guardianship, and juvenile offender cases that are not confidential or sealed from public viewing. As required by law, limited case information is available on some sealed case types.

Matters filed before July 1, 1979 and stored on microfilm are only available for viewing during business hours at the Clerk's Office downtown Seattle location where the microfilm is stored.