International Association of Assessing Officers (IAAO) Email Format

Non-profit OrganizationsMissouri, United States51-200 Employees

The International Association of Assessing Officers is a nonprofit organization focused on property appraisal, assessment administration, and property tax policy, providing education and research resources in these areas. Founded in 1934, IAAO counts more than 7,000 members from government jurisdictions as well as business and academic communities. The organization is based in Kansas City, Missouri, operating as a professional association with a mid-sized footprint.

In 2024, IAAO introduced the Mass Appraisal of Real Property standards to support accurate, current property data. In February 2025, IAAO announced its involvement in organizing the Global Property Congress 2025 in Sydney, alongside other industry organizations, with program submissions being sought.

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