The chart above shows the most populous city in each US state and the proportion of that state's population that resides there.  Unlike in the European Union were 14 states have over one-quarter of their population living in the most populous city, only three states do so in the US.  In the US, living in a state's largest city is not as prevalent.

The chart above shows the most populous city in each EU state and the proportion of that nation's population that resides there.  Luxembourg and Malta are obvious outliers due to their size but the rest of the EU still has quite a range from Berlin which only consists of just over one out of every twenty Germans to Riga which consists of just under one out of two Latvians.