Sigma Organizational Fact Sheet


Our Vision 

Connected, empowered nurse leaders transforming global healthcare

Our Mission

Developing nurse leaders anywhere to improve healthcare everywhere

Strategic Goals

The Sigma board of directors has determined three strategic goals to guide the organization:
1. Nurses find Sigma resources and programs essential to further their professional advancement.
2. Sigma is the preeminent pathway to connect to nursing excellence around the globe.
3. Sigma connects nurses to industry, to lead the design and utilization of healthcare innovations to transform care delivery.

Learn more about the strategic plan and guiding principles.


Sigma provides valuable resources throughout your entire nursing career. Potential members who meet our eligibility criteria are invited to join Sigma, which includes baccalaureate and graduate nursing students who demonstrate excellence in scholarship. Nurse leaders who exhibit exceptional achievements in nursing can also be invited to join. Here are some additional facts about our membership:  
  • Sigma has more than 100,000 active members.
  • Members reside in more than 100 countries.
  • There are roughly 600 chapters at more than 700 institutions of higher education throughout Armenia, Australia, Botswana, Brazil, Canada, Colombia, England, Ghana, Hong Kong, Ireland, Israel, Jamaica, Japan, Jordan, Kenya, Lebanon, Malawi, Mexico, the Netherlands, Pakistan, Philippines, Portugal, Scotland, Singapore, South Africa, South Korea, Swaziland, Sweden, Taiwan, Tanzania, Thailand, the United Kingdom, and the United States of America.

Products and Services

Sigma has always recognized the value of scholarship and excellence in nursing practice. In 1936, Sigma became the first US organization to fund nursing research. Today, Sigma supports these values through its numerous professional development products and services that focus on the core areas of education, leadership, career development, evidence-based nursing, research, and scholarship. These products and services advance the learning and professional development of members and all nurses who strive to improve the health of the world’s people.

  • Sigma, with its grant-offering partners (corporations, associations, and foundations), contributes more than US $200,000 annually to nursing research through grants, scholarships, and monetary awards.
  • A number of education and research conferences are supported by Sigma, including a yearly research congress that presents the latest nursing research from around the world and a biennial convention that offers nursing’s best practices in clinical, scientific, and leadership areas.
  • Online nursing continuing professional development (NCPD) offers peer-reviewed interactive learning activities that are presented in a variety of learning formats including case studies, evidence-based articles, and module courses. These activities are linked to full-text articles and abstracts and are available for NCPD contact hours.
  • The Sigma Repository is an online digital service that collects, preserves, and disseminates digital materials in both abstract and full-text format. Submissions to this repository may be made by individual nurses and nursing students as well as nursing organizations.  
  • Sigma's career development programming provides resources for every stage in the career process, from selecting nursing as a profession to active retirement.
  • Leadership programs include mentoring programs and global healthcare think tanks.


  • Journal of Nursing Scholarship is one of the most widely read and respected healthcare journals. Published bimonthly by Wiley, JNS contains peer-reviewed, thought-provoking articles representing research by some of the world’s leading nurse researchers. You can also receive NCPD contact hours for select articles. This is free for members!
  • Worldviews on Evidence-Based Nursing is a primary source of information to improve patient care. Each bimonthly issue contains knowledge synthesis and original articles with best practice applications, recommendations for clinical practice, nursing education, administration, and public healthcare policy. You can also receive NCPD contact hours for select articles. This is free for members!
  • Scholarly books cover a wide range of topics in nursing and healthcare that are of interest to members and other nurses around the world.
  • Nursing Centered is Sigma's mixed-media resource center that shares stories and nursing information from Sigma nurses and chapters worldwide, from their view, in their voice. It is home to Sigma articles, member stories, videos, webinars, and A Nurse First podcast episodes.
  • Sigma Update is a monthly electronic newsletter sent to all members that includes chapter-specific information and announcements. 


In 1922, six nurses founded Sigma Theta Tau International Honor Society of Nursing, today known as Sigma, at the Indiana University Training School for Nurses, which is now the Indiana University School of Nursing, in Indianapolis, Indiana, USA. The founders chose the name from the Greek words storgé, thárros, and timé, meaning love, courage, and honor. Sigma became incorporated in 1985 and is a nonprofit organization with a 501(c)(3) tax status in the United States. Learn more about Sigma's founders.

Honor Society Archives

Sigma Records: 1920-2016, Ruth Lilly Special Collections and Archives, IUPUI University Library, Indiana University Purdue University Indianapolis, Indianapolis.

Related Organizations

Sigma Foundation for Nursing 

The Foundation holds all permanent funds of Sigma. These assets are distributed over nine endowed or restricted funds, each established for a specific purpose. Endowed funds contain donations made by members and friends of nursing, but only the interest earned from these funds is distributed. Restricted funds hold monies that are given to Sigma for a specific activity and are distributed accordingly.

Sigma Marketplace 

Sigma Marketplace (formerly Nursing Knowledge International) was established in 2002. Through its e-commerce website, Sigma Marketplace delivers nursing knowledge that is designed to improve patient outcomes by enhancing the knowledge base of its nurse customers.

The International Honor Society of Nursing Building Corporation 

Incorporated in 1993 as a corporation with 501(c)(2) status, 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 39,350-square-foot building and grounds.