The Americans With Disabilities Act (ADA) is one of America's most comprehensive pieces of civil rights legislation that prohibits discrimination and guarantees that people with disabilities have the same opportunities as everyone else to participate in the mainstream of American life—to enjoy employment opportunities, to purchase goods and services, and to participate in State and local government programs and services.

To be protected by the ADA, one must have a disability, which is defined by the ADA as a physical or mental impairment that substantially limits one or more major life activities, a person who has a history or record of such an impairment, or a person who is perceived by others as having such an impairment. The ADA does not specifically name all of the impairments that are covered. The ADA is located in the United States Code, beginning at 42 U.S.C. §12101.

The ADA prohibits discrimination on the basis of disability in the activities of places of public accommodations (businesses that are generally open to the public and that fall into one of 12 categories listed in the ADA, such as restaurants, movie theaters, schools, day care facilities, recreation facilities, museums, libraries, parks, and doctors' offices). The ADA requires newly-constructed or altered places of public accommodation—as well as commercial facilities (privately owned, nonresidential facilities such as factories, warehouses, or office buildings)—to comply with the ADA Standards. Private clubs and religious organizations are exempt from the ADA's title III requirements for public accommodations.

In Washington State, the Americans with Disabilities Act (ADA) is a federal law that provides comprehensive civil rights protections to individuals with disabilities. It ensures non-discrimination in various aspects of public life, including employment, access to goods and services, and participation in state and local government programs. Under the ADA, a disability is defined as a physical or mental impairment that significantly restricts one or more major life activities, or being regarded as having such an impairment. The ADA's protections apply to public accommodations, which are businesses and facilities open to the public, encompassing a range of categories from entertainment venues to educational institutions. New or renovated public accommodations and commercial facilities must adhere to ADA Standards for accessible design. However, private clubs and religious organizations are exempt from Title III, which covers public accommodations. Washington State also has its own laws and regulations that complement the ADA, providing additional protections and enforcement mechanisms to ensure that individuals with disabilities can fully participate in society.