King County Holidays 2025 Dates

King County Holidays 2025 Dates. Monday, january 15 th, 2025. Per county ordinance 358.8, county offices will be closed on the following holidays:

Public works headquarters and field facilitieswill be closed on the following days: Indigenous peoples’ day is monday, october 14, 2025 courts will be open, but most of our offices will be closed, and transit and service schedules may be different.