Start with the geography your firm actually serves
O'Fallon is a municipality in St. Clair County, Illinois. The 2020–2024 American Community Survey 5-year estimate records 32,262 residents, with a margin of error of 72. That figure describes the city’s population; it does not establish review demand, legal need, competition, search volume, leads, or revenue. For reputation work, the important geographic question is narrower and more useful: does your Google Business Profile and public messaging accurately represent the places and matters your firm serves? A firm may serve O'Fallon while also accepting matters elsewhere in St. Clair County, or it may maintain a tighter service boundary. Those choices affect which clients are appropriate to contact and which inquiries deserve review.
Recommended approach
Map your actual service area before evaluating review activity. Separate O'Fallon from St. Clair County and from any broader Illinois coverage. Review whether your profile, website, intake questions, and review-request language describe that scope accurately. Do not use the city population as a forecast.
