George Hervey Hallett Jr

George Hervey Hallett Jr. (1895–1985) was a civic activist, electoral reformer, author and avid birder. As long-standing official of the Citizens Union of the City of New York, a municipal reform group, , he led the change to proportional representation in the 1930s and in the 1970s, he led the revision of the New York City Charter.

Hallett was born in 1895 to a Quaker family in Philadelphia, Pennsylvania. He attended Haverford College, received a master's degree in mathematics from Harvard University and a PhD from the University of Pennsylvania. He was a conscientious objector during World War I. He authored the 1937 book Proportional Representation The Key to Democracy and co-authored with C.G. Hoag the 1926 book Proportional Representation.

In the 1970s, while in his 70s, he led a campaign for the revision of the New York City Charter. This was adopted by voters in 1975.

He died in 1985.

The Hallett Nature Sanctuary in the southern end of New York City's Central Park was dedicated to his memory on June 30, 1986.