1. Define the service area without blurring Sherman and Grayson County
The Census record identifies Sherman as a city in Grayson County. Those are different geographic descriptions, and a Local Services Ads profile should not treat them as interchangeable without a business decision behind the setting. Your firm may want inquiries from Sherman, from other parts of Grayson County, or only from selected communities within its service area. The available population estimate does not tell you which choice will produce demand. It only confirms the municipality and county relationship.
Recommended approach
Before changing geographic coverage, list the locations your firm actually serves, the locations it will review, and the locations it does not want to pay to investigate. Ask Bosseo to show how service areas would be configured and how out-of-area inquiries would be recognized during lead review. Keep Sherman and Grayson County separate in your internal reporting so a broad county setting does not make city-level performance impossible to understand.
