Biggest U.S. Cities Founded After 1900

It certainly would have been easier if I went by the incorporation date for these cities, but from what I read on Irvine's Wikipedia page was that Irvine was an agglomeration of towns, the oldest of which was a town called Murphy which was established sometime between 1888 and 1914, due to the uncertainty on the exact date I decided to not include it whatsoever, although I could see an argument for it

I wouldn't be opposed however to recreating the quiz as "Biggest U.S. Cities Created After 1900" to be based on incorporation date rather than foundational date although I don't know if that keeps as interesting of a concept as the foundation date