Affiliated Tribes of Northwest Indians

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Non-Profit Organizations Public & Non-Profit Government Organizations

About Affiliated Tribes of Northwest Indians

The Affiliated Tribes of Northwest Indians (ATNI) is a nonprofit 501(c)(3) organization based in Portland, OR that specializes in government affairs and tribal advocacy. Since 1953, ATNI has served as a unified voice for 57 Northwest tribal governments spanning Oregon, Idaho, Washington, southeast Alaska, Northern California, and Western Montana. The organization operates through a structured governance model featuring an Executive Council, Executive Board, and specialized committees that manage the organization's strategic initiatives and policy work. ATNI's government practice areas focus on advancing tribal sovereignty and self-determination across the Pacific Northwest region. The organization's constitutional framework and comprehensive Policies & Procedures Manual ensure transparent, accountable operations that reflect the needs and priorities of its member tribal nations. With offices at two strategic Northwest locations, ATNI provides coordinated representation and support services to tribal governments navigating complex federal, state, and regional policy landscapes. The organization's commitment to member-centered governance means that all decision-making authority flows from the tribes it represents, ensuring that advocacy efforts and organizational priorities remain aligned with tribal interests and values.