1. Start with the geography your firm actually serves
The 2020–2024 ACS five-year population estimate is 48,532, with a margin of error of 42.
Recommended approach
Use the Gallatin–Sumner County relationship as a boundary for reporting and review, not as a forecast. In a consultation, identify which locations, practice areas and service territories should be visible in your attribution records. Then decide whether a source should be evaluated by municipality, county, broader service area or another geographic field your firm already uses.
