Under state law (RCW 29A.04.086) a major political party is a political party of which at least one nominee for President of the United States, United States Senator, or a statewide office received at least five percent (5%) of the total votes cast in the last general election held in an even-numbered year.

The Democratic and Republican parties are the only major parties in Washington State at this time.

Political parties included below are currently recognized by the Washington Secretary of State: www.secstate.wa.gov.

American Heritage Party of Washington State
(888) 396-6247 PO Box 241
Leavenworth, WA 98826
fax: (425) 670-8421
contact@ahparty.org
www.americanheritageparty.org

Constitution Party of Washington
(509) 928-6910
PO Box 11227
Tacoma, WA 98411
contactus@constitutionpartyofwa.com
www.constitutionpartyofwa.com

Green Party of Washington State
(206) 781-3848
PO Box 70515, Seattle, WA 98127
wagreens@gmail.com
www.wagreens.us

Washington State Democratic Central Committee
583-0664
615 2nd Ave. Ste. 580, PO Box 4027
Seattle, WA 98194
fax: (206) 583-0301
info@wa-democrats.org
www.wa-democrats.org

King County Democratic Central Committee
622-9157
PO Box 58337
Renton WA 98058
fax: (425) 255-1634
info@kcdems.org
www.kcdems.org

Washington State Republican Party
(206) 575-2900
16400 Southcenter Pkwy.
Ste. 200
Seattle, WA 98188
fax: (575-1730)
comments@wsrp.org
www.wsrp.org

King County Republican Central Committee
(425) 990-0404
845 106th Ave NE #110
Bellevue, WA 98004
fax: (425) 990-0407
myoung@kcgop.org
www.kcgop.org

Libertarian Party of Washington State
(800) 353-1776
15831 NE 8th, Ste 210, PO Box 7118
Bellevue,WA 98009
Fax: (425) 641-9085
office-manager@lpwa.org
www.lpwa.org

Progressive Party of Washington
(206) 467-1370
PO Box 1034, Puyallup, WA 98371
waprog2@yahoo.com
www.waprogparty.org

Reform Party of Washington State
(206) 448-8670
13530 Linden Ave N. #410
Seattle WA 98133
reformpartywa@yahoo.com www.reformparty.org