Founded in 1922 by six nursing students, Sigma Theta Tau International Honor Society of Nursing (Sigma) has more than 100,000 active members and 600 chapters at institutions of higher education and healthcare partners from Armenia, Australia, and Botswana to Thailand, the United States, and Wales. Sigma members include clinical nurses and administrators, academic nurse educators and researchers, policymakers, entrepreneurs, and others working to fulfill the organization’s vision of connected, empowered nurse leaders transforming global healthcare. 

Vision 
Mission 

Meet the 2021-2023 International Board of Directors

 Sigma's elected leaders and chief executive officer are leading Sigma into the future.

Global Values Statement

Sigma is an international community of nurses, dedicated to the advancement of knowledge, teaching, learning, and service through the cultivation of communities of practice, education, and research.


Our subsidiaries

Sigma Foundation for Nursing

Thanks to donors, the Sigma Foundation for Nursing funds research grants, leadership education grants, membership subsidies, and Sigma programs that connect and empower nurses around the world.

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Sigma Marketplace

Established in 2002, the Sigma Marketplace is committed to providing evidence-based knowledge solutions developed for nurses by nurses.

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Sigma Building Corporation

The Building Corporation holds title to real and personal property for the benefit of Sigma. It is also responsible for managing and maintaining Sigma’s headquarters building and grounds.

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