American Institute of CPAs (AICPA)The American Institute of Certified Public Accountants (AICPA) is the world’s largest member association representing the accounting profession, with nearly 386,000 members in 128 countries and a 125-year heritage of serving the public interest. AICPA members represent many areas of practice, including business and industry, public practice, government, education and consulting. The AICPA sets ethical standards for the profession and U.S. auditing standards for audits of private companies, nonprofit organizations, federal, state and local governments.