David G. Greenfield

In July 2017, he announced that he would not be seeking a third term, and would instead be taking over as CEO of the Metropolitan Council on Jewish Poverty.

Greenfield was ranked as the 51st most powerful New Yorker in City & State's Power 100 list in 2014. In 2021 he rose to the 14th spot on the list.

Greenfield was considered a political moderate in a liberal New York City Council. Greenfield authored a law that banned the Department of Sanitation from placing hard-to-remove stickers on vehicles that were parked on the wrong-side of the street. He co-authored a law that requires the Department of Education to notify parents and teachers about potentially harmful polychlorinated biphenyl (PCB) in classrooms. Greenfield also introduced a law that would stop New York City from towing cars for unpaid parking tickets and instead boot the car. Greenfield's proposed legislation was adopted by the New York City Council Department of Finance as a pilot program in June 2012. Greenfield was also the author of the Vision Zero legislation that lowers the default speed-limit in New York City to 25 miles per hour. This legislation is the lynchpin of Vision Zero and is widely considered to be the key strategy behind saving lives by reducing traffic accidents in New York City.

David G. Greenfield is an American politician, law professor, and non-profit organization executive. He served as a Democrat in the New York City Council from the 44th district from 2010 to 2017. The district includes Bensonhurst, Borough Park, Gravesend, Kensington, Midwood, and Sheepshead Bay in Brooklyn.

On January 7, 2010 Greenfield announced his candidacy on the Zev Brenner radio show to replace Simcha Felder. Felder announced his resignation after accepting the post as the new deputy comptroller for accounting and budget under John Liu. Greenfield received endorsements from U.S. Senator Joseph Lieberman, then-Mayor Michael R. Bloomberg, former Mayor Ed Koch, and State Senators Carl Kruger, Martin J. Golden. He received the support of council members Domenic Recchia, Lewis Fidler, Michael C. Nelson, and Vincent J. Gentile, as well as the backing of the Kings County Conservative Party, Democratic county leader Vito Lopez, and Citizens Union.

Greenfield voted against a year 2010 bill requiring the New York City Clerks office to post on its website and distribute at its office information on where in the world (countries, jurisdictions, and US States) same-sex gay couples are able to get married.

As Director and Counsel of TEACH NYS, Greenfield organized statewide advocacy campaigns that resulted in private and public school parents receiving tax breaks and private schools receiving more government assistance. Greenfield served as deputy director of finance in Senator Joseph Lieberman's 2004 presidential campaign. Prior to that, he had a stint as chief of staff to Assemblyman Dov Hikind.