>> people still overwhelmingly live in urban areas

If you restrict the classification to urban vs. rural, then yes, people overwhelmingly live in urban areas, something like 80% to 20% according to the census.

If you add in suburban, it changes. There's no authoritative definition of the term, but there was a Pew Research Center poll that asked people to describe the community they live in and the response was 25% urban, 43% suburban, and 30% rural. (And I guess 2% something else?)