Kambium Elijah "Kam" Buckner (born May 12, 1985) is an American politician and attorney who serves as a Democratic member of the Illinois House of Representatives from the 26th district. The district, located entirely in Chicago, includes neighborhoods such as Bronzeville, Downtown, Gold Coast, and Hyde Park, among others. Buckner is the past chair of the Illinois House Black Caucus and Assistant Majority Leader for the House Democratic Caucus. He currently serves as Speaker Pro Tempore and budgeteer. In college, he played football for the Illinois Fighting Illini football team as an offensive tackle and defensive lineman.

He was a candidate in the 2023 Chicago mayoral election, but lost in the first round.

Buckner was raised on the South Side of Chicago, and attended Morgan Park High School. He earned an undergraduate degree from the University of Illinois at Urbana–Champaign, where he played for the Illinois Fighting Illini football team and was a teammate of future NFL standouts Vontae Davis, Kelvin Hayden, Pierre Thomas, and Rashard Mendenhall. While at the University of Illinois he became a member of Omega Psi Phi. Buckner later earned a J.D. degree from the DePaul University College of Law.

Buckner began his political career as an aide to Senator Dick Durbin in Washington D.C. from 2007 until 2012 and as an advisor to Mayor Mitch Landrieu in New Orleans from 2012 through 2013. From 2013 to 2015, he led government and neighborhood relations for the Chicago Cubs, helping drive the $575 million privately funded Wrigley Field renovation known as the 1060 Project. In 2015, he was appointed Executive Director of World Sport Chicago, a nonprofit that grew from the Chicago bid for the 2016 Summer Olympics.

On January 8, 2017, Governor Bruce Rauner appointed Buckner to the Board of Trustees of Chicago State University for a term expiring January 15, 2023.

Buckner has taught at University of Chicago and has been a contributor for The Hill and Crain's Chicago Business. Since 2015, he has also served as vice president of governmental affairs for Outfront Media.

On January 18, 2019, Buckner was appointed to the Illinois House of Representatives to succeed Christian Mitchell, who left to become a deputy governor in the J.B. Pritzker administration. In the 2020 election, he was re-elected unopposed to a two-year term. In December 2020, he was elected as chairman of the Illinois House Black Caucus. In 2022, he became Assistant Majority Leader in the Illinois House of Representatives.

In 2023, Edward Robert McClelland of Chicago magazine wrote that, during the 2021–2022 Illinois General Assembly, Buckner played a role in the passage of some of the "most significant legislation", citing his role in the passage of the SAFE-T Act and legislation which will transform the Chicago Board of Education into an elected school board. In 2023, A.D. Quig of the Chicago Tribune characterized Buckner as an active member of the Illinois House of Representatives, writing that Buckner,