No US states have a capital with only 4 letters; they all have 5 letters or more.
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.
10
utah
Do you mean which US states have 10 letters?CaliforniaWashington
Iowa Ohio Utah
Three U.S. states have four letters in their name. The states are Iowa, Ohio and Utah.
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There are no countries that have only 3 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.
Colorado, Nebraska, Illinois, New Jersey, Kentucky, Missouri
Iowa, Ohio and Utah.