The Associated General Contractors (AGC) of Washington is the state's largest and most influential trade association that represents and provides services to the commercial construction industry. The AGC of Washington has more than 600 member companies, 160 of which are general contractors, and has significant programs involving government and labor relations, group insurance, workplace safety, workforce development, and more. Headquartered in Seattle with offices in Tacoma, Bellingham, Yakima, and Olympia, the AGC of Washington is a professional association of commercial contractors who join together to enhance the performance and representation of members, to promote the respect and integrity of the industry, and to improve the quality of life in our communities.

One of 96 chapters of AGC of America , the AGC of Washington exercises jurisdiction over building, heavy, municipal and utility, marine, industrial and highway construction in that portion of the State of Washington west of the 120th Meridian, except the five-and-one-half counties of southwest Washington, namely, Klickitat, Skamania, Clark, Cowlitz, and Wahkiakum and the portion of Pacific County south of a straight line made by extending the north boundary line of Wahkiakum County west to the Pacific Ocean.