How many of the deadliest tornadoes occurred in Illinois?

Answer 1

Illinois has experienced 4 of the United States' 25 deadliest tornadoes. Note that three of these tornadoes caused damage and fatalities in other states as well as Illinois.

• The Tri-State tornado of 1925. The deadliest tornado in U.S. history with 695 deaths (606 in Illinois). Deaths also occurred in Missouri and Indiana
• The St Louis tornado of 1896. The third deadliest tornado in U.S. history with at least 255 deaths (118 in Illinois). Deaths also occurred in Missouri.
• The Mattoon tornado of 1917. The 14th deadliest tornado in U.S. history with 101 deaths, all in Illinois.
• The Camanche, Iowa tornado of 1860. This ranks as the 21st or 11th deadliest U.S. tornado in U.S. history with between 92 and 115 deaths (the source in this is conflicting). If the higher death toll is taken, the death toll in Illinois is either 23 or 46 with the rest of the deaths in Iowa. 23 people died on a boat on the Mississippi River, so it is unclear which state they occurred in.