Warrenville, located in DuPage County, Illinois, had a population of 13,553 as of the 2020 census. As a western suburb of Chicago, it is situated along the DuPage River and is part of the Illinois Technology and Research Corridor. It is also conveniently located just north of Interstate 88.

In 1833, Warrenville was established by Julius Warren and his family who relocated from New York to start anew after their gristmill and distillery business faltered. Julius and his father Daniel each acquired land in different locations, which are now known as McDowell Woods and the Warrenville Grove Forest Preserve. Julius Warren constructed an inn and tavern in 1838, utilizing the family’s expertise in timber and grain. This establishment, which was renovated in 2002, remains standing to this day.

Based on the 2010 census data, Warrenville covers a land area of 5.46 square miles (14.14 km2) and a water area of 0.158 square miles (0.41 km2), making up 97.19% and 2.81% of its total area, respectively.

Warrenville is home to Durham School Services, a thriving company. In 2011, Navistar, another prominent business, made the move from Warrenville to Lisle, taking advantage of tax incentives offered by the neighboring town.

Warrenville hosts the Illinois Youth Center, a rehabilitation center for young female offenders.

Warrenville is within the boundaries of Community Unit School District 200 and is linked with Wheaton through a shared total of 20 schools. Students living in Warrenville typically go to either Bower or Johnson elementary school, then proceed to Hubble Middle School, and finally attend Wheaton Warrenville South High School. While Wheaton Warrenville South High School is situated in Wheaton, the new Hubble Middle School building was relocated to Warrenville in time for the 2009–2010 academic year, replacing the original site in Wheaton.

Prominent individuals in various fields include Adam Emory Albright, a painter known for his figure-in-landscape works, and Ivan Albright, a magic realist painter. Dustin Byfuglien, who played as a Right Wing/Defense for the Winnipeg Jets in the NHL, was part of the Chicago Blackhawks team that won the Stanley Cup in 2010. Brooks McCormick, who served as the chief executive officer of International Harvester and was a notable philanthropist and equestrian, was the son of art collector Chauncey McCormick. Other notable figures mentioned include Tony Moeaki, a Tight End for The Chicago Bears; Miles J. Stanford, a Christian author; Jack Steadman, the former president and general manager of the Kansas City Chiefs; and John Maynard Woodworth, who was the first Surgeon General of the United States.