I mentioned it in another response in this thread, but while it's technically correct that SF is both a city and a county, making it the first actual county to ban the tech, it's important identify the fact that this ban covers a much wider area, a population of ~2.2 million compared to ~880,000, and 39 towns/cities compared to 1.

With that in mind I don't have much of an issue with the use of the word "county", considering there aren't a whole ton of city-counties relative to the total number of counties in the US.