1. Treat Orange City and Sioux County as separate planning questions
The Census records Orange City city as a municipality in Sioux County. That relationship matters because an Orange City address does not, by itself, define the area your firm can serve or the area you should advertise. A firm may want inquiries from Orange City only, from parts of Sioux County, or from a broader service territory. Those are different geographic decisions. The population estimate of 6,426 is useful for identifying the place and its scale, but it cannot be used to predict demand or competition.
Recommended approach
Begin with a service-area review. List the communities and county areas your firm is prepared to handle, then compare that list with the locations allowed by the relevant LSA setup. Keep Orange City and Sioux County distinct in reporting so you can see whether inquiries come from the municipality, elsewhere in the county, or outside your preferred territory.
