1. Start with Princeton’s actual service area
Princeton is recorded as a municipality in Bureau County, Illinois. The 2020–2024 ACS five-year population estimate for Princeton city is 7,975, with a margin of error of 213. That figure describes the city population; it does not establish legal demand, search volume, competition, call volume or likely revenue. It also does not describe every individual or household your firm may serve. For attribution, the important geographic question is operational: which locations, service pages and referral paths should be distinguishable in your records?
Recommended approach
Define the geographic scope before judging performance. Decide whether the review should cover Princeton city only, Bureau County more broadly, or additional Illinois locations your firm serves. Then identify the location and practice-area pages that should be included in the inquiry journey. Treat the Census figure as context for the service area, not as a forecast. Your attribution design should answer whether a lead came through a relevant page or source, without turning population into a claim about need or results.
