The Medal of Honor is the highest award for a military service member. It is awarded by the president himself (maybe one day, herself) to military men and women who have performed acts of valor, courage, and bravery that distinguish them from others serving in the line of duty. About 624 Medals of Honor have been awarded posthumously, meaning that the president gave the award to someone who has died.
The award was created in 1861, at the beginning of the American Civil War (which lasted from 1861 until 1865), and only about 3500 people have received it in the entire 160 years of its existence. Forty percent of all recipients received it during the American Civil War, which left only about 2100 who have received it since 1865.
There is not much correlation between the Medal of Honor and the state in which someone lives. The Medal of Honor is a very rare reward for someone to receive, and it seems to be becoming rarer and rarer. For example, over 1500 soldiers and other military personnel (such as nurses and chaplains) earned the Medal of Honor during the Civil War. During World War I, which lasted from 1914 until 1918, there were only 126 people who received the Medal of Honor. In World War II (the US was involved from 1941 until 1945), there were 472 recipients, but in the Vietnam War (which lasted from 1955 until 1975), there were only 261.
In the most recent wars that the United States has been engaged in, the war in Iraq (which began in 2003 and is continuous), and the war in Afghanistan (which began in 2001 and is ongoing), there have only been six and 18, respectively.
Given that so many Medals of Honor were given during the American Civil War to Union forces who fought for the North, the states that have the most Medal of Honor recipients are those that were part of the United States (not including the Southern states that seceded) between 1861 and 1865 and that was actively involved in the Civil War (not all of the country was involved in the war; for example, states on the West Coast were not). After the Civil War, however, there is no correlation between states and Medal of Honor recipients beyond a state’s population; more populous states have more recipients than those with lower people.