Dominic A. Pacyga is an American urban historian. He was a professor of history at Columbia College, Chicago from 1984 until 2017. Previous to his appointment to the faculty he served as associate director of Columbia College's Southeast Chicago Historical Project in Chicago's Steel District. He has worked in urban history, ethnic history and immigration history with a particular emphasis on the Polish diaspora in the United States. He is the author of Slaughterhouse: Chicago's Union Stock Yard and the World It Made (2018), Chicago: a Biography (2011), and American Warsaw: The Rise, Fall, and Rebirth of Polish Chicago (2021), each published by the University of Chicago Press, as well as Polish Immigrants and Industrial Chicago: Workers on the South Side, 1880-1922 (1991), published by Ohio State University Press. His new book Clout City: The Rise and Fall of the Chicago Political Machine was published in October 2025, by the University of Chicago Press. He is also co-author with Glen E. Holt of Chicago: A Historical Guide to the Neighborhoods [Loop and South Side] published by the Chicago Historical Society in 1979, and with Ellen Skerrett, Chicago City of Neighborhoods by Loyola University Press in 1986. He co-authored Chicago’s Southeast Side with Rod Sellers published by Arcadia Publishing in 1998. Pacyga co-edited with Charles Schanabruch, The Chicago Bungalow also published by Arcadia Publishing in 2001. His work has been translated into both the Polish and Chinese languages.