Six states have five or less letters in their name. Iowa, Ohio and Utah have four letters in their name. Idaho, Maine and Texas have five letters in their name.
47, all of them except Iowa, Ohio, and Utah. If you mean how many have exactly 5 letters in their names, then it is 3: Idaho, Maine, and Texas.
No US states have a capital with only 4 letters; they all have 5 letters or more.
Texas, Hawaii9
Iowa Ohio Utah
Five US states have eleven letters in their names: Connecticut, Mississippi, North Dakota, South Dakota, and last but not least Rhode Island.
· Iowa · Ohio · Utah
Iowa, Ohio and Utah.
Boise, ID Dover, DE Salem, OR
Five or six. Numerals only. No letters.
Only five border the Gulf.
To my knowledge, the proper capitalization is The United States of America. However, when using the letters only, it is the US or the USA.