High Quality Content by WIKIPEDIA articles! A single-winner voting system is a voting system in which a predetermined constituency elects a single person to some office; such systems contrast generally with proportional representation, in which constituencies are combined[clarification needed] to elect several representatives at once. It is also called a single-member district system. If there is to be only one officeholder, often the case for executive positions such as president, mayor, or governor, single-winner systems are the only option. If there are several officeholders ? for instance, for a legislature ? there are other voting systems available.