2 ms·In fact Phoenix is on the list of "secondary cities" and is the 5th largest city in the US.by jjjensen90 8y agoIn fact Phoenix is on the list of "secondary cities" and is the 5th largest city in the US.dawhizkid 8y ago“Secondary” is not a matter of size but about socioeconomic influencesnarfy 8y agoIt's still secondary to Los Angeles, where many are migrating from.