[1] During his tenure, the 23rd district spanned northern DuPage County and included all or parts of Addison, Bloomingdale, Bartlett, Carol Stream, Glendale Heights, Hanover Park, Itasca, Roselle, Villa Park, West Chicago, Wayne, Wood Dale and Medinah.

He served one term before defeating incumbent Joyce Stupegia in a three-way race to become Village President in 2009.

[6] Later that year, Cullerton was recognized by the Sierra Club for reducing the village's carbon footprint via Cool Cities.

[8] In November 2011 Tom Cullerton announced his candidacy for state senate in the newly redrawn 23rd district.

[16] In 2012, DuPage County performed a review that found a variety of small units of government that provide mosquito abatement, sanitary and street lighting services cost taxpayers $300 million annually.

[19] In response, Cullerton introduced SB 494 as a pilot program to allow for consolidation of these types of government bodies.

[20] The bill’s cosponsors included suburban legislators and it was supported by Republican County Board Chair Dan Cronin.

[25] In 2015, Representative Jack Franks a co-sponsor of SB 494 proposed legislation to give McHenry and Lake counties the same ability to consolidate small, special purpose districts.

[27] The commission recommended Illinois establish a requirement for a civics course as a part of a broader revision of the state's social studies standards, that the state establish a project-based and/or service learning requirement, student involvement in elections and professional development for teachers who teach civics.

[29] The McCormick Foundation and other non-profit organizations pledged $3 million to cover the costs of civics education training for teachers in poorer school districts.

[33] In 2014, DuPage County began to train officers in the use of Narcan, a medication that reverses the effect of opioids like heroin in overdoses.

[34] In 2015, Cullerton served as Chief Co-sponsor of SB 10 which would amend the Alcoholism and Other Drug Abuse and Dependency Act to allow local law enforcement to the list of entities that may apply for grants to create or support local drug overdose prevention, recognition, and response projects including grants for training in the use of narcan to stop overdoses.

[35] In September, Cullerton voted to override Bruce Rauner's veto of the Heroin Crisis Act.

The task force is charged with investigating the causes of veteran suicide and forming policy recommendations for the Illinois General Assembly to act on.

[4] Cullerton resigned his seat in the Illinois Senate on February 23, 2022, the same day he announced his intent to plead guilty to 1 count of embezzlement.