David Duvall Orr (born October 4, 1944) is an American Democratic politician who served as the Cook County Clerk from 1990 to 2018.

Born in Chicago, Orr is a graduate of Simpson College in Indianola, Iowa for his undergraduate and his Masters Degree in American Studies from Case Western Reserve University in Cleveland.

[5] In February 1979, Orr was elected by a narrow margin of 320 votes alderman from the 49th Ward,[5] which covered most of the Rogers Park neighborhood in the far northeastern corner of Chicago.

In February 1983, with the Machine divided between supporters of Jane Byrne and Richard M. Daley, black independent Harold Washington became Mayor.

[8] In 1986, Orr, with the assistance of fellow alderman Bernard Stone, successfully pushed an ordinance through City Council that declared Chicago a "nuclear-free zone".

[9][5] Chicago Tribune columnist Mike Royko, a cynic towards local politics, stated in 1988, "there are three or four aldermen who are suspected of being honest and [Orr] is one of them.

[8][10] After Orr resigned from the City Council in 1990 in order to serve as county clerk, then-mayor Richard M. Daley appointed Robert Clarke as his replacement.

[9] In 1994, Orr was considered a potential front-runner if he entered the election for president of the Cook County Board of Commissioners, but he ultimately decided to run for reelection as clerk instead of seeking the position.

[23][24][22] He supported several candidates in the 2019 Chicago aldermanic election, including Maria Hadden (who ran for his old 49th ward seat), Michael Rodriguez, Andre Vasquez, Matt Martin, Susan Sadlowski Garza, David Moore, and Scott Waguespack.