1. Begin with the Mattoon service area, not a population assumption
The U.S. Census Bureau records Mattoon as a municipality in Coles County and gives the city a 2020–2024 ACS 5-year population estimate of 16,586, with a margin of error of 410. It should not determine an automation design by itself. For your firm, the useful local question is narrower: which inquiries from Mattoon, Coles County and any other areas you intentionally serve enter the same workflow, and which require different handling?
Recommended approach
Define the geographic scope of your intake before discussing automation. Decide whether the same routing and follow-up should apply to every inquiry serving Mattoon and Coles County, or whether matter type, urgency, office responsibility or another firm-approved rule should change the next action.
