1. Define Tecumseh as a service area, not a demand forecast
The Census record identifies Tecumseh as a city in Pottawatomie County and records a 2020–2024 ACS five-year population estimate of 6,332, with a margin of error of 25. That fact can help you state the location precisely. It cannot establish how many people seek legal help, which practices are competitive or how many inquiries a page may produce. Your site should distinguish Tecumseh from Pottawatomie County, Oklahoma and any broader area you actually serve. Those are different geographic descriptions, and combining them without explanation can make a page less useful to both people and search systems.
Recommended approach
Begin with a service-area review. Confirm which locations your firm serves, which offices or consultation arrangements you can accurately describe, and whether a Tecumseh page should address city residents, county residents or both. Do not use the population estimate as a forecast. Use it only as context while deciding whether the page reflects your real geographic scope.
