How many state names in the U.S. start with the letter "I"?

There are four states in the United States that begin with the letter "I". They are: Idaho, Illinois, Indiana and Iowa. Idaho is a state in the northwestern region of the United States. It is the 14th largest, the 39th most populous, and the 7th least densely populated of the 50 United States. Illinois is a state in the mid-western region of the United States. It is the 5th most populous state, and 25th largest state in terms of land area. It is often noted as a microcosm of the entire country. Indiana is a U.S. state located in the mid-western and Great Lakes regions of North America. Indiana is the 38th largest by area and the 16th most populous of the 50 U.S. And, Iowa is a U.S. state in the mid-western part of the country, bordered by the Mississippi River on the east and the Missouri River and the Big Sioux River on the west. Surrounding states include Wisconsin and Illinois to the east, Missouri to the south, Nebraska and South Dakota to the west, and Minnesota to the north. It is the 26th most extensive in land area and the 30th most populous state in the U.S.