DuPage County Sheriff's Office
- Includes overview of office holder, jail information, sex offenders, most wanted, crime watch, crime stoppers, programs and services, employment, and contact details.
- http://www.dupageco.org/sheriff/

DuPage Juvenile Officers Association
- A not-for profit organization, serves and promotes the interests of county youth.
- http://www.dupagejuvenileofficers.org/

DuPage Mayors and Managers Conference
- A council of 36 municipal governments in DuPage County, was founded in 1962 and comprised of appointed and elected officials to address municipal public policy issues. Features programs, members directory, links and resources.
- http://www.dmmc-cog.org/

Office Of The Jury Commission, 18th Judicial Circuit Court, DuPage County, Illinois
- Information for prospective jurors summoned to jury service in the 18th Judicial Circuit Court, DuPage County, Illinois
- http://www.co.dupage.il.us/jury

DuPage County Metropolitan Enforcement Group
- Pro-actively problem solving illicit drug trafficking within the DuPage County, so as to achieve maximum operational effectiveness.
- http://www.dupagemeg.com/

DuPage County Illinois Government
- Provides information on weekly agendas, employment, recycling programs, bids and request for proposals (RFPs), county history and background, FAQs, volunteer opportunities and newsletters.
- http://www.co.dupage.il.us/