Susana A. Mendoza (born May 13, 1972) is an American politician. She is the 10th and current Comptroller of Illinois, taking office on December 5, 2016. She previously served as the City Clerk of Chicago from 2011 to 2016. Mendoza is a member of the Democratic Party, was the first Latina to be elected to the position of Illinois Comptroller, and is the highest ranking Hispanic elected official in Illinois. In 2022, Mendoza was the state of Illinois' top vote getter.

Mendoza was first elected as Illinois State Representative in 2000 and served six terms. In February 2011, she was elected City Clerk of Chicago, becoming the first woman to hold this position. She was twice elected City Clerk and served for five years before successfully running for the role of Illinois Comptroller in 2016. Mendoza ran unsuccessfully in the 2019 Chicago mayoral election.

On July 16, 2025, Mendoza announced that she would not seek re-election in 2026.

Mendoza was born in Chicago to Joaquin and Susana Mendoza, immigrants from Mexico who arrived in the 1960s. Due to violence in her Little Village neighborhood, her family relocated to Woodridge and later Bolingbrook, Illinois, during her childhood.

Mendoza completed her high school education at Bolingbrook High School in 1990, achieving All-State and All-Midwest honors in varsity soccer then pursued higher education at Northeast Missouri State University (now Truman State University), where she attended on a combined soccer and academic scholarship, graduating in 1994 with a Bachelor of Arts in Business Administration. During her college soccer career, from 1990 to 1994, she redshirted the 1993 season due to an injury sustained in the first game. Over her collegiate career, she made 68 appearances, scoring 10 goals and assisting another 10 for the Lady Bulldogs, also earning All-Midwest Honors.

After graduating, Mendoza returned to Chicago's Little Village neighborhood with her family. She began working full-time in the hospitality industry and later as an account executive at an advertising firm. In her free time, she became actively involved in community organizing within her neighborhood, which marked the start of her engagement in Chicago politics.

In 1998, Mendoza ran for office in the 1st Legislative District with the support of the regular Democratic Organization but narrowly lost to independent progressive incumbent Sonia Silva, who was backed by House Speaker Mike Madigan. In 2000, with endorsements from Mayor Daley and the Hispanic Democratic Organization, Mendoza ran a second time to secure a position as an Illinois State Representative. At 28, she became the youngest member of the 92nd Illinois General Assembly.

During her tenure, Mendoza chaired the International Trade and Commerce Committee, Vice-chairwoman of the Bio-Technology Committee and was a member of the Labor, Public Utilities and Railroad Industry committees of the House. She co-chaired the Conference of Women Legislators, helped establish the first Illinois Legislative Latino Caucus, and passed a bill to provide school children with breakfast.