Define the geographic area before you pay for leads
Thompson is recorded as a town in Sullivan County. That relationship matters when you review Local Service Ads settings: the firm should distinguish the town itself from the county and from any wider New York service area it actually accepts. A population estimate for Thompson cannot tell you how many people search for a lawyer, how many firms advertise, or how many inquiries an LSA program would produce. Those are questions for account review and ongoing measurement.
Recommended approach
Prepare a clear service-area policy before launch. Identify whether your firm wants inquiries from Thompson only, from other parts of Sullivan County, or from additional areas in New York. Do not broaden coverage merely because a larger area contains more residents. Match geography to the matters you accept and the distance your lawyers can reasonably serve.
