Mass killings in Colorado

Since 1993 the state has experienced at least 7 active shooter incidents with three fatalities or more, not including the assailant.

Boulder

Thornton

Arvada

Aurora

Denver

Littleton

Colorado Springs

COLORADO

Deaths

Injuries

Incident

Year

Victims

King Soopers

Boulder

2021

10

Walmart

Thornton

2017

3

Planned Parenthood

Colorado Springs

2015

3

9

Colorado Springs

2015

3

Colorado church shootings

Arvada and Colorado Springs

2007

4

5

Century 16 Theater

Aurora

2012

12

58

Columbine High School

Littleton

1999

13

24

Aurora

1993

4

1

Boulder

Thornton

Arvada

Aurora

Denver

Littleton

Colorado Springs

COLORADO

Deaths

Injuries

Incident

Year

Victims

King Soopers

Boulder

2021

10

Walmart

Thornton

2017

3

Planned Parenthood

Colorado Springs

2015

3

9

Colorado Springs

2015

3

Colorado church shootings

Arvada and Colorado Springs

2007

4

5

Century 16 Theater

Aurora

2012

12

58

Columbine High School

Littleton

1999

13

24

Aurora

1993

4

1

Boulder

Thornton

Arvada

Aurora

Littleton

Denver

Colorado Springs

COLORADO

Deaths

Injuries

Incident

Year

Victims

King Soopers

Boulder

2021

10

Walmart

Thornton

2017

3

Planned Parenthood

Colorado Springs

2015

3

9

Colorado Springs

2015

3

2007

Colorado church shootings

Arvada and Colorado Springs

4

5

Century 16 Theater

Aurora

2012

12

58

Columbine High School

Littleton

1999

13

24

Aurora

1993

4

1

Boulder

Thornton

Arvada

Aurora

Littleton

Denver

Colorado Springs

COLORADO

Deaths

Injuries

Incident

Year

Victims

King Soopers

Boulder

2021

10

Walmart

Thornton

2017

3

Planned Parenthood

Colorado Springs

2015

3

9

Colorado Springs

2015

3

2007

Colorado church shootings

Arvada and Colorado Springs

4

5

Century 16 Theater

Aurora

2012

12

58

Columbine High School

Littleton

1999

13

24

Aurora

1993

4

1