Start with the Mehlville service area, not an assumed demand signal
Mehlville is recorded as a census-designated place in St. Louis County, Missouri. The 2020–2024 ACS five-year estimate records 29,805 residents, with a margin of error of 2,166. That is geographic context for defining the service area; it does not establish legal demand, search volume, competition, lead volume, case volume or revenue. For custom software, the practical question is narrower: which people, offices, intake sources and service areas must the workflow represent?
Recommended approach
Bring a precise description of the firm’s operating area to the review. Distinguish Mehlville from St. Louis County and from any broader metropolitan coverage in your internal records. Then decide whether the proposed tool needs a location field, service-area rule or reporting view. Those choices should follow the firm’s actual workflow, not the population estimate.
