How do you punctuate the address 26 West 18th St Seattle WA 96430?

The address "26 West 18th St, Seattle, WA 96430" should be punctuated with a comma after the street number and name, as well as after the city name. Additionally, there should be a comma after the state abbreviation "WA" to separate it from the ZIP code "96430." This punctuation format helps to clearly separate the different components of the address for easy reading and processing.