Start with Sioux City’s actual service boundary
The U.S. Census Bureau records Sioux City city as a municipality in Iowa. Its recorded county relationships are Plymouth County and Woodbury County. The 2020–2024 ACS five-year population estimate for the city is 86,101, with a margin of error of 29. That figure provides geographic context; it does not establish legal demand, search volume, competition, inquiries or revenue. For attribution, the important question is not how large the city is. It is whether your firm can distinguish inquiries associated with Sioux City from matters associated with the counties, other Iowa locations or a broader metropolitan service area.
Recommended approach
Define the geography you want to evaluate before reviewing performance. Decide whether a report should distinguish Sioux City city, Plymouth County, Woodbury County and other areas your firm serves. Keep those categories separate rather than treating city population as evidence of likely lead volume.
