This is misleading to most people. The US census counts the suburbs as urban. I don't believe most people referring to urban areas are referring to people in the suburbs.

"To qualify as an urban area, the territory identified according to criteria must encompass at least 2,500 people, at least 1,500 of which reside outside institutional group quarters."

https://www.census.gov/programs-surveys/geography/about/faq/...