Does a comma go after the state when an address is in middle of sentence?

No, a comma does not go after the state when an address is in the middle of a sentence.

Here's why:

* Addresses are treated as a single unit: Think of the entire address (including the street number, street name, city, state, and zip code) as a single entity.

* Commas separate clauses and items in a list: An address within a sentence isn't a clause or a list item.

Example:

* Incorrect: He moved to 123 Main Street, New York, last year.

* Correct: He moved to 123 Main Street, New York, last year.

Note: You do use a comma after the state when listing an address at the end of a sentence:

* Correct: He lives at 123 Main Street, New York 12345.