Start with the geography your firm actually serves
The U.S. Census Bureau records Beaverton as a municipality in Washington County and reports a 2020–2024 ACS five-year population estimate of 97,812, with a margin of error of 60. That is context for the place—not evidence of legal demand, search volume, call volume, language preference, competition or revenue. Your attribution design should therefore preserve the difference between a Beaverton inquiry, a Washington County inquiry and an inquiry from elsewhere in Oregon. The useful question is not how many people live in Beaverton. It is whether your records can show where an inquiry originated and whether that geography aligns with your practice and service area.
Recommended approach
Review whether geography is captured as part of qualification or intake, and decide how your team distinguishes the city from the county and wider Oregon service area. Do not use the population estimate as a forecast. Use actual inquiry and matter records to evaluate geographic fit over time.
