Columbine, Colorado Columbine, Colorado Columbine is a census-designated place (CDP) in Arapahoe and Jefferson counties in the U.S. state of Colorado. Located mostly in Jefferson County, it lies immediately west of Littleton. The population was 24,280 at the 2010 census. Columbine High School, made infamous by the Columbine High School massacre in April 1999, is located in the community. The ZIP codes for the community are 80123 and 80128. Columbine is located on the eastern edge of Jefferson County at (39.587887, -105.069332), with a small portion extending east into Arapahoe County. Columbine is bordered to the east by Littleton and Columbine Valley,
Columbine High School massacre in the shooting. The Columbine shootings influenced subsequent school shootings. Many school shooting plots mention it. Shortly after, a rash of copycat threats led to the closing of entire districts. One arrested student boasted he could "outdo" its number of casualties. The first copycat may have been the W. R. Myers High School shooting, just 8 days later, when a 14-year old Canadian student went into his school at lunchtime, with a sawed-off .22 rifle under his dark blue trench coat, and opened fire, killing one student. A month after the massacre, Heritage High School in Conyers, Georgia had a