Thurston County facilities are now open to the public with restrictions, including maintaining physical distancing of at least six feet at all times and, per the Washington State Secretary of Health’s face covering order wearing a cloth face covering or mask. If you come to county facilities, please be prepared for potentially long wait times or lines due to distancing guidelines. We continue to encourage residents to access county services online, by phone, by email, or through the use of drop boxes located outside of county buildings.
The availability of remote services vary by office and department.

Click here for office and department contact information
Click here for information on COVID-19

Thurston County Investment Pool

It is the policy of the Thurston County Treasurer’s Office to invest public funds in a manner which will provide maximum security with the highest investment return while meeting daily cash flow demands and conforming to all state and local statutes governing the investment of public funds.  For additional information regarding the overall investment program, please use the links below.


​Policy & Certifications


​Portfolio Performance


​Finance Committee Reports


​Pool Participants

  • Thurston County
  • School & Educational Service Districts:
    • Educational Service District #113
    • Griffin School District #324
    • North Thurston Public Schools #3
    • Olympia School District #111
    • Rainier School District #307
    • Rochester School District #401
    • Tenino School District #402
    • Tumwater School District #33
    • Yelm Community Schools #2
  • Fire Protection Districts & Consortiums:
    • Bald Hills Fire District #17
    • East Olympia Fire District #6
    • Griffin Fire District #13
    • Lacey Fire District #3
    • McLane Black Lake Fire District #9
    • S.E. Thurston Fire Authority
    • South Bay Fire District #8
    • South Thurston Fire District #12
    • West Thurston Fire & Life Safety
    • West Thurston Regional Fire Authority
  • Black Lake Special District
  • Chambers Lake Drainage District #3
  • Grand Mound Cemetery District #1
  • Hopkins Drainage District #2
  • Housing Authority of Thurston County
  • Intercity Transit
  • Lewis-Mason-Thurston Area Agency on Aging
  • LOTT Clean Water Alliance
  • Olympic Region Clean Air Agency
  • Port of Olympia
  • Public Utility District #1 of Thurston County
  • Scott Lake Drainage District #11
  • Tanglewilde Park and Recreation District #1
  • Thurston 9-1-1 Communications
  • Thurston Regional Planning Council
  • Thurston-Mason Behavioral Health Organization
  • Timberland Regional Library
  • Washington State Transit Insurance Pool
  • Yelm Cemetery District #2