General Rules:
* Most states use the name of the state as the adjective.
* Use a hyphen when the state name is two words.
* Some states have unique adjectives that are not derived from their names.
Examples:
* California: Californian
* New York: New York (no hyphen needed)
* New Jersey: New Jersey (no hyphen needed)
* South Carolina: South Carolinian
* North Dakota: North Dakotan
* Pennsylvania: Pennsylvanian
* Massachusetts: Massachusetts (no hyphen needed)
* Rhode Island: Rhode Islander
* Hawaii: Hawaiian
States with Unique Adjectives:
* Alabama: Alabamian
* Alaska: Alaskan
* Arkansas: Arkansan
* Connecticut: Connecticuter
* Idaho: Idahoan
* Illinois: Illinoisan
* Iowa: Iowan
* Kansas: Kansan
* Kentucky: Kentuckian
* Louisiana: Louisianan
* Maine: Mainer
* Maryland: Marylander
* Michigan: Michigander
* Minnesota: Minnesotan
* Mississippi: Mississippian
* Missouri: Missourian
* Montana: Montanan
* Nebraska: Nebraskan
* Nevada: Nevadan
* New Hampshire: New Hampshirite
* New Mexico: New Mexican
* Ohio: Ohioan
* Oklahoma: Oklahoman
* Oregon: Oregonian
* Vermont: Vermonter
* Virginia: Virginian
* Washington: Washingtonian
* West Virginia: West Virginian
* Wisconsin: Wisconsinite
* Wyoming: Wyomingite
Note: Some states have multiple possible adjectives. For example, you can use "Texan" or "Texas" as adjectives for Texas. The best choice often depends on the context and personal preference.
Let me know if you'd like more information or have specific state names in mind!