Start with Columbia and Marion County coverage
The relevant geography is not interchangeable: Columbia is a city, and its recorded county relationship is Marion County. Your firm may serve people in Columbia, elsewhere in Marion County, or additional Mississippi communities. Those are separate coverage decisions. The city’s 2020–2024 ACS population estimate of 6,632 cannot be used to predict demand or competition. Instead, decide which locations your practice can serve, which matters you want, and whether a caller from each area is within your intake policy.
Recommended approach
Bring a written service-area policy to the consultation. Separate Columbia from Marion County and from any wider Mississippi coverage. Ask how each location and practice category would be represented in the Local Service Ads profile, then compare inquiries by location and eligibility rather than treating the population estimate as a forecast.
