O'Fallon, MOO'Fallon, Missouri sits inside the St. Charles County growth corridor west of downtown St. Louis, a market this page treats as its own planning zone rather than a downtown extension.

O'Fallon is the largest city in St. Charles County and anchors the western edge of the St. Louis metro's I-70 growth corridor, roughly a half-hour drive from the downtown convention core depending on traffic and time of day.

Companies based here send exhibitors, sales teams, and marketing staff into downtown venues like America's Center and the Ballpark district hotels, but the trip back to St. Charles County shapes call times, crew scheduling, and freight staging.

This page treats O'Fallon as its own planning zone: a place where meetings happen locally even when the main show floor sits downtown, and where drive time and freight routing deserve the same attention as venue selection.

None of this changes the fact that O'Fallon operates on the same overall service radius as the rest of St. Charles County and the Metro East, so a program based here is documented once and reused, not treated as a one-off exception every time a new event comes up.