After several failed attempts by the U.S. government to persuade the Native Americans to move from the area, in 1833 they agreed under coercion to vacate their land for a nominal payment.

[4] The development of the Illinois-Michigan Canal, authorized by the State of Illinois in the 1820s but delayed in construction until the 1830s, contributed to Westmont's early growth.

[4] Many of the workers turned to farming when the economic panic of 1837 halted canal construction; agriculture became the major occupation with produce sold in nearby Chicago.

"Gregg's Milk Station,[5]" from which Westmont developed, was a stop to load agricultural and dairy products.

In the early 1900s, plats for the Village of Westmont were laid out and roads were dedicated; incorporation was decided by a vote of 41-28 in 1921.

Westmont was officially incorporated on November 4, 1921; Vince Pastor served as the first president of the Village Board.

According to the 2021 Comprehensive Financial Report, the top employers in Westmont are:[12] The town officially opened a 94 unit luxury residential apartment building dubbed Quincy Station in 2022, a transit-oriented and pet-friendly development.

Pace provides bus service on Route 715 connecting Westmont to Glen Ellyn and other destinations.