Last time I was out at bars in NYC it was 4am and I believe this is still the case. DC is 3am, as is Hawaii, West Virginia, Indiana, and some places in Illinois.

Parts of Alaska are apparently 5am and Louisiana has no official last call from what I've read.

I'm sure there are some other cities or states with late last call requirements but I'm only familiar with these ones. Occasionally in my city, there are special exceptions like New Year's Eve where bars can stay open and serve all night if they feel like it.

Louisiana is like the wild west of alcohol control. I'm pretty sure you can go to a bar, get a drink to go at 5 am, and take it to another bar (while drinking it on the street).

Someone made a nice graphic that shows opening times in the US: https://www.reddit.com/r/dataisbeautiful/comments/3ddapj/bar...

That is correct, New York is 4am. And I even remember many years of my life when 4am used to seem impossibly early and oppressive. I don't remember them all that well mind you.

I realize it varies, but most of the US has some sort of last-call. I think Vegas and New Orleans are the only cities I've visited (in the US) without one.