From the website, "Revolutionary War":
"The United States enlisted a total of about 200,000 soldiers and sailors during the war. Battle casualties were 4435 dead and 6188 wounded. An estimated 20,000 Americans died of non-combat causes. [Other sources cite: 'An estimated 25,000 American Revolutionaries died during active military service. About 8,000 of these deaths were in battle; the other 17,000 deaths were from disease, including about 8,000 who died while prisoners of war. The number of Revolutionaries seriously wounded or disabled by the war has been estimated from 8,500 to 25,000. The total American military casualty figure was therefore as high as 50,000.']
1200 Hessians were killed in action and 6,354 died from illness or accident.
According to data from the Daughters of the American Revolution, the last surviving U.S. veteran of the conflict, George Fruits, died in 1876 at the age of 114. However, Fruits was never on a pension roll.
The last surviving veteran may have been Daniel F. Bakeman (died 1869), who was placed on the pension rolls by an act of Congress and is listed as the last survivor of the conflict by the United States Department of Veterans' Affairs."