It has a population center of 20k within 15 miles. That was only one that I looked at. I didn't even have to try for that. I know nothing about that region but

It has a population center of 20k within 15 miles. That was only one that I looked at. I didn't even have to try for that. I know nothing about that region but at an eagle eye's glance, it's obviously a suburb. It's part of an incorporated metropolitan area. It is, therefore, a suburb. It is not rural. Atherton isn't a suburb of Palo Alto btw. Palo Alto is the suburb.