Cambridge, Massachusetts has used the at-large form of ranked choice voting, an American form of proportional representation, to elect its City Council and School Committee since 1941. Cambridge adopted ranked choice voting at a time when more than two-dozen cities across the United States, including New York, Cincinnati, and Cleveland, used RCV to elect city councils and other positions in local government. Many of the cities that adopted RCV in that era did away with it due to changes in voting technology and the increased ability of racial minorities to get elected under RCV, but the system remains in Cambridge.
Ranked choice voting allows groups of like-minded voters to elect representatives in proportion to their share of the population, and has ensured fair representation of the city's political and ethnic minority groups for over 70 years. In February 2014, FairVote published a report on the effects this system had on the city's elections in 2013, and an op-ed in the Cambridge Chronicle discussing the use of this form of fair representation voting in the city.