Robert Sayre

Robert Sayre may refer to:
 * Robert Sayre, involved in Atom (standard)
 * Robert H. Sayre, eponymous namesake of Sayre, Pennsylvania, once the chief engineer of the Lehigh Coal & Navigation Company, later hired as the Chief Engineer and Superintendent of the Lehigh Valley Railroad from its survey in 1846 onwards.
 * Robert M. Sayre, American diplomat