In which the US Post Office Trolls my 6th Grade English Teacher

I was trying writing out my address for work, and I couldn't remember what my 6th Grade English teacher taught me about writing out an address.

Normally, my general attitude regarding such matters is, "who cares?" But this is for a contract amendment so I want to at least appear to know what I'm about.

Anyhow, I was struggling to remember the proper way to punctuate City, State, and Zip Code in the address.

My odd brain tells me it's like this:

Denver CO, 80209

My odd brain is telling me that because of the mental pause it inserts after Colorado. "Denver Colorado...80209"

My old 6th grade style guide actually says it is like so:

Denver, CO 80209

My odd brain reads this as "Denver...COLORADO80209" which is why it seems weird to me.

In any case, I was curious so I looked it up on the Post Office's website.

The Post Office would prefer no punctuation at all, thankyouverymuch.

https://pe.usps.com/text/pub28/28c2_001.htm#ep526236

The postal addressing standard would have you write:

DENVER CO 80209

Seems like the comma-less address preference has been that way since around 2011.