457 (disambiguation)

457 may refer to:
 * The year AD 457 in the Western calendar
 * The number 457
 * The 457 plan, a retirement plan available to government and nonprofit employees in the United States similar to the 401(k)
 * The 457 visa, the most commonly used program for employers to sponsor overseas workers to work in Australia on a temporary basis.
 * The Smith & Wesson Model 457, a pistol.