1R

1R may refer to:
 * Complement component 1R
 * Intelsat 1R, a communications satellite
 * Yaesu VX-1R, a radio transceiver
 * OneRepublic, a pop-rock/alternative band from Colorado, United States
 * SSH 1R (WA), a former highway that is now Washington State Route 504
 * 1R (chromosome)