Certified Public Accountant (CPA) is the title of qualified accountants in numerous countries in the English-speaking world. It is generally equivalent to the title of chartered accountant in other English-speaking countries. In the United States, the CPA is a license to provide accounting services to the public. It is awarded by each of the 50 states for practice in that state. Additionally, all states except Hawaii have passed mobility laws to allow CPAs from other states to practice in their state. State licensing requirements vary, but the minimum standard requirements include passing the Uniform Certified Public Accountant Examination, 150 semester units of college education, and one year of accounting-related experience.

Continuing professional education (CPE) is also required to maintain licensure. Individuals who have been awarded the CPA but have lapsed in the fulfillment of the required CPE or who have requested conversion to inactive status are in many states permitted to use the designation "CPA Inactive" or an equivalent phrase. In most U.S. states, only CPAs are legally able to provide attestation (including auditing) opinions on financial statements. Many CPAs are members of the American Institute of Certified Public Accountants and their state CPA society.

State laws vary widely regarding whether a non-CPA is even allowed to use the title "accountant". For example, Texas prohibits the use of the designations "accountant" and "auditor" by a person not certified as a Texas CPA, unless that person is a CPA in another state, is a non-resident of Texas, and otherwise meets the requirements for practice in Texas by out-of-state CPA firms and practitioners.