Mark Kirk

Mark Steven Kirk (born September 15, 1959) is an American retired politician and attorney who served as a United States senator from Illinois from 2010 to 2017, and as the United States representative for Illinois's 10th congressional district from 2001 to 2010. A member of the Republican Party, Kirk describes himself as socially liberal and fiscally conservative. As of 2026, he is the last Republican to represent Illinois in the U . Senate. Born in Champaign, Illinois, Kirk graduated from Cornell University, the London School of Economics, and Georgetown University Law Center. He practiced law throughout the 1980s and 1990s. He joined the United States Navy Reserve as a direct commission officer in the intelligence career field in 1989 and was recalled to active duty for the 1999 NATO bombing of Yugoslavia. He participated in Operation Northern Watch in Iraq the following year. He attained the rank of Commander and retired from the Navy Reserve in 2013. Kirk was elected to the House in 2000. During his fifth term in November 2010, he won two concurrent elections: to finish the final months of former senator Barack Obama's term and to serve the next six-year term. He was sworn in on November 29, 2010, and began a six-year Senate term on January 3, 2011. In January 2012, Kirk suffered a stroke; almost a full year passed before he returned to his senatorial duties. In 2016, Kirk ran for re-election to a second full term, but was defeated by Democrat Tammy Duckworth.