1. Start with Duncan’s actual service area
Duncan is a municipality in Oklahoma, and the Census Bureau records its county relationship as Stephens County. The 2020–2024 ACS five-year population estimate for Duncan city is 22,958, with a margin of error of 35. That is geographic eligibility evidence, not evidence of legal demand, search volume, competition, call volume or revenue. Your attribution design should therefore distinguish Duncan city from Stephens County and from any broader Oklahoma service area your firm chooses to serve. A source record that says only “Google” or “Duncan” may be too broad for a budget decision. You need to know which page and channel produced the inquiry, then compare that information with the geography your firm actually accepts.
Recommended approach
Define the geographic fields and service-area rules you want reviewed before judging performance. Keep Duncan city, Stephens County and any wider territory separate in reporting. Do not use the population figure as a forecast; use it only to confirm that Duncan is a defined municipality in the proposed scope.
