This is a List of notable shootings in the U.S. State of Colorado.
Since the 1990s, three Colorado massacres in the Denver metropolitan area have garnered national attention: the Columbine High School massacre in 1999, which resulted in 15 deaths (including the post-massacre suicides by the two perpetrators); the Aurora shooting in 2012, which resulted in 12 deaths; and the 2021 Boulder shooting, which resulted in 10 deaths.
The deadliest massacre in Colorado history took place in 1914 in Ludlow.