1. Start with the service area, not a population shortcut
Lake Holiday is a CDP in LaSalle County. A firm may serve Lake Holiday while also serving other parts of the county or Illinois, but those geographic relationships should be stated accurately. The local question for Reputation & Reviews is therefore not whether 5,641 residents guarantee opportunity. It is whether your public profile and review process accurately represent where you serve and the matters you handle. A review from a Lake Holiday client may be useful social proof, but it does not by itself prove that every person in the CDP is a prospective client or that a particular practice area has local demand.
Recommended approach
Map the geographic language used on your Google Business Profile, website and review-request messages. Decide which locations and service areas are accurate and appropriate to mention. Keep Lake Holiday, LaSalle County and broader Illinois coverage distinct rather than presenting one population figure as a market forecast.
