1. Define the service area without treating population as demand
The relevant geographic relationship is specific: Bellingham is a city in Whatcom County, Washington. An LSA profile can use service areas, but the existence of 93,438 residents in the city does not tell you how many people search for a lawyer, how many firms compete for those searches or how many inquiries would be suitable for your practice. It also does not answer whether your firm wants inquiries from outside Bellingham but within Whatcom County. Those are business decisions, not Census conclusions.
Recommended approach
Start by listing the communities and travel boundaries your firm actually serves, then compare that list with the service zones available for the profile. Decide whether a matter outside Bellingham but within Whatcom County is acceptable before paying for a lead. Review geography separately for each practice area so the profile does not invite inquiries your team cannot handle.
