The Thurston County Courthouse the Capitol Court Building in Olympia, Washington is the former headquarters of Thurston County. It was built in 1930 and has been listed on the National Register of Historic Places since 1981. In 1978, the court was relocated to Olympia's Westside; the building remained vacant until 1989 and renovations were completed in 1991. Since 1995, offices in the building have been leased by various government agencies and private businesses.
The Art Deco style, reinforced concrete building has of floor space and is made of Tenino sandstone. It is 4 stories tall, with a raised basement, a 2-story addition on each side, and topped with a rectangular tower. The foundation measures by . The primary contractor was Walter Boyer of Yakima.
On March 25, 1929, Joseph Wohleb was selected to design a new courthouse for Thurston County, to be located at the southeast corner of Capitol Way and 11th Avenue. Construction was completed the following year for a project cost of $350,000 (equivalent to $ million in ).
A formal dedication ceremony took place on Friday, September 12, 1930 with hundreds in attendance; the courthouse was officially open for business the following Monday, September 15.
In 2020, the building underwent a $3.5 million renovation, including cleaning, repairs to cracks in historic sandstone exterior masonry, and restoration of original windows.
, the building provides facilities for the following tenants: