When writing about states, follow these Associated Press guidelines.
The names of the 50 U.S. states should be spelled out when used in the body of a story, whether standing alone or in conjunction with a city, town, village or military base.
Place one comma between the city and the state name, and another comma after the state
name, unless ending a sentence or indicating a dateline: He was traveling from Nashville,
Tennessee, to Austin, Texas, en route to his home in Albuquerque, New Mexico.
Zip Code Abbreviations: Use the two-letter Postal Service abbreviations only with full addresses, including ZIP code. These abbreviations are two capitalized letters, with no periods.
Washington, D.C.: Use state of Washington or Washington state when necessary to distinguish the state from the District of Columbia (Washington, D.C.).