New York City Transit Authority v. Beazer, 440 U.S. 568 (1979), was a case decided by the United States Supreme Court in which the constitutionality of an employer's refusal to hire methadone users was upheld.

The New York City Transit Authority (NYCTA) adopted a rule prohibiting the employment of anyone who used narcotic drugs.

The court for the Southern District of New York ruled in favor of the plaintiffs and found the policy unconstitutional.

The Court was confronted with the question of whether a government could choose not to employ, as an entire class, users of narcotic drugs.

The Court, in an opinion delivered by Justice Stevens, reversed the decision of the lower courts and found that the NYC Transit Authority had a rational basis for its classification of narcotics users and the extension of this rule to cover methadone users.