The Sand Creek Massacre: Historical Context and Current Demographic Impact in Colorado

The Sand Creek Massacre, which occurred on November 29, 1864, remains a defining event in American history, involving the brutal killing of more than 230 Cheyenne and Arapaho people, primarily women, children, and the elderly, by U.S. volunteer soldiers. Today, Native Americans represent approximately 2.3% of Colorado’s total population, according to the U.S. Census Bureau, reflecting a long history of displacement and systemic shifts in the region.

What Happened at Sand Creek?

On the morning of November 29, 1864, Colonel John Chivington led approximately 700 men of the 1st and 3rd Colorado Cavalry regiments against a peaceful encampment of Cheyenne and Arapaho people along Big Sandy Creek in southeastern Colorado. According to the [National Park Service](https://www.nps.gov/sand/index.htm), the encampment was under the protection of the U.S. government, with tribal leaders having been instructed to camp there to demonstrate their desire for peace.

Despite flying an American flag and a white flag of truce, the village was attacked. The soldiers killed more than 230 people. The event is widely documented as one of the most egregious acts of violence against Indigenous people in the American West, leading to immediate congressional investigations that condemned the conduct of the Colorado volunteers.

How Has the Native American Population Changed in Colorado?

The demographic landscape of Colorado has shifted significantly since the mid-19th century. Following the forced removal of tribes from their ancestral lands in the late 1800s, the Native American presence in the state declined sharply.

Current data from the [U.S. Census Bureau](https://www.census.gov/quickfacts/fact/table/CO/PST045223) indicates that American Indians and Alaska Natives make up a small fraction of the state’s population. While the 2020 Census figures show this group accounts for about 2.3% of the state’s residents—when accounting for those identifying as Native American alone or in combination with other races—the historical context of the 1864 massacre serves as a focal point for understanding the displacement of the Cheyenne and Arapaho nations, who were largely pushed out of Colorado and onto reservations in Oklahoma, Wyoming, and Montana.

Why Does the Massacre Remain Significant Today?

The legacy of the Sand Creek Massacre continues to influence contemporary tribal relations and historical education. The [Sand Creek Massacre National Historic Site](https://www.nps.gov/sand/learn/historyculture/index.htm), established by Congress in 2007, serves as a place of reflection and remembrance.

The site is managed in consultation with the Northern Cheyenne Tribe, the Northern Arapaho Tribe, and the Cheyenne and Arapaho Tribes of Oklahoma. It functions as a critical space for acknowledging the violence perpetrated by the U.S. military and for honoring the survivors and descendants of those killed.

Key Takeaways

* The Event: On November 29, 1864, U.S. volunteer cavalry killed over 230 Cheyenne and Arapaho people at a camp on Big Sandy Creek.
* The Context: The victims were non-combatants—mostly women and children—who had been assured safety by federal officials.
* Modern Demographics: Native Americans and Alaska Natives currently comprise approximately 2.3% of Colorado’s population, according to recent federal census data.
* Commemoration: The site is now a National Historic Site, preserved to ensure the history of the massacre is accurately documented and remembered by future generations.