The National Rural Letter Carriers' Association (NRLCA) is an American labor union that represents the rural letter carriers of the United States Postal Service (USPS). The NRLCA negotiates all labor agreements for the rural carrier craft with the USPS, including salaries, and represents members of the rural carrier craft in the grievance procedure. The NRLCA's stated goal is to "improve the methods used by rural letter carriers, to benefit their conditions of labor with the United States Postal Service, and to promote a fraternal spirit among its members."

The United States Postal Service (USPS), also known as the Post Office, U.S. Mail, or Postal Service, is an independent agency of the executive branch of the United States federal government responsible for providing postal service in the United States, its insular areas, and its associated states. It is one of the few government agencies explicitly authorized by the Constitution of the United States. As of 2023, the USPS has 525,469 career employees and 114,623 non-career employees.