The team plays its home matches at Energizer Park, a soccer-specific stadium across from Union Station in Downtown West.

[5] Despite approved plans to build the $600 million Collinsville Soccer Complex, MLS was unimpressed with the bid's financial backing and suggested Cooper expand his group of investors.

[13] The proposed ownership group sought public funds to help build a $200 million soccer-specific stadium next to Union Station in downtown St. Louis.

[16] St. Louis's MLS bid was effectively re-launched on October 9 of that year, with Carolyn Kindle and other heirs to the Enterprise Rent-A-Car fortune as the primary investors.

[18] On November 28, 2018, the Board of Aldermen's Housing, Urban Development, and Zoning Committee voted 8–0 to approve the stadium plan.

The league, then at 27 teams, advised the Commissioner's office to advance the discussions with the Sacramento Republic and St. Louis bids, who would make presentations to the expansion committee.

[20][21] Two days later, the St. Louis group unveiled their stadium plan with a design produced by HOK and Snow Kreilich Architects.

[22] On August 20, 2019, MLS announced it had approved St. Louis as the league's 28th franchise, with play expected to begin in the 2022 season.

[26] The Missouri state government had promised $30 million in tax credits for the stadium project, but withdrew their offer in December 2019.

[34] On April 1, 2023, St. Louis City SC lost their first game in their history against Minnesota United FC with the score 0–1 in CityPark.

[35] At the end of their inaugural season, St. Louis City SC finished first in the Western Conference and qualified for the 2024 CONCACAF Champions Cup.

[citation needed] They were eliminated from the MLS Cup Playoffs by eighth-seeded rivals Sporting Kansas City in the first round after losing the first two games in the best-of-three series.

Officially, the team's colors are city red, river blue, energy yellow, arch steel gray, and white.

[41][42] The stadium is intended to field 17 to 23 soccer games a year and serve as a venue for concerts, high school sports, and more.

The St. Louligans were founded in 2010 when several local soccer fan groups joined forces at AC St. Louis home games.

Notable contributions of the group include awarding a new fan each week with a ticket, and coordinating with the Coopers, supporters for Louisville City FC, to create the Kings' Cup rivalry competition between the two teams.

For their first encounters in 2023, the two teams met twice in the space of a week, and Chicago won both matches despite their visitors sending large numbers of traveling supporters.

A series of emails from Sporting Kansas City’s front office arrived in the inbox of the podcast’s Gmail account.

[citation needed] In the 2024 spring season, the Academy became the UPSL Gateway Premier champions and secured a spot in the National Round of 32.