Daniel Kálmán Biss (born August 27, 1977) is an American mathematician and politician. Biss is the Mayor of Evanston, Illinois since 2021. He was a member of the Illinois Senate from the 9th district, serving from January 2013 to January 2019. The district includes Chicago's northern suburbs, including Evanston, Glencoe, Glenview, Golf, Morton Grove, Golf, Northbrook, Northfield, Skokie, Wilmette, and Winnetka.
Biss previously served in the Illinois House of Representatives from 2011 to 2013.
He was a candidate in the Democratic Party primary for Governor of Illinois in the 2018 election.
Biss announced his candidacy for Mayor of Evanston, Illinois in the 2021 election in November 2020. He won the election in a landslide victory in February 2021.