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 friend Dylan Klebold and others. The mascot of Columbine High School (CHS) is the Rebels, and he called these "Rebel Missions". Harris and Klebold adopted the nicknames "Reb" and "Vodka" respectively. Beginning in early 1997, the blog postings began to show the first signs of Harris's ever-growing anger against society. By the end of the year, the site contained instructions on how to make explosives. Harris wrote "the first true pipe bombs created entirely from scratch by the rebels (REB and VoDkA)...Now our only problem is to find the place that will be 'ground zero.'" Harris's site attracted few visitors,