Counties in Colorado by natural change, July to June
Denver County had the highest natural change, July to June of 64 counties in 2021, at 3,958. Pueblo County had the lowest, at -679. The median was -3 and the figure for Colorado was 15,559. Source: the U.S. Census Bureau.
Top 40 counties, 2021
Full ranking
| Rank | Counties | 2021 | Change on 2020 |
|---|---|---|---|
| 1 | Denver County Estimated | 3,958 | +3.4% |
| 2 | El Paso County Estimated | 3,054 | -20.3% |
| 3 | Arapahoe County Estimated | 2,894 | -2.6% |
| 4 | Adams County Estimated | 2,346 | -24.5% |
| 5 | Weld County Estimated | 2,145 | -10.1% |
| 6 | Douglas County Estimated | 1,605 | -11.9% |
| 7 | Boulder County Estimated | 373 | +5.7% |
| 8 | Eagle County Estimated | 341 | -13.9% |
| 9 | Larimer County Estimated | 325 | -56.8% |
| 10 | Garfield County Estimated | 298 | -16.8% |
| 11 | Broomfield County Estimated | 185 | -18.5% |
| 12 | Summit County Estimated | 179 | +1.1% |
| 13 | Jefferson County Estimated | 137 | -80.4% |
| 14 | Morgan County Estimated | 72 | -55% |
| 15 | Routt County Estimated | 63 | +26% |
| 16 | Gunnison County Estimated | 49 | -9.3% |
| 17 | Pitkin County Estimated | 46 | -41% |
| 18 | Elbert County Estimated | 39 | -15.2% |
| 19 | Alamosa County Estimated | 32 | -50% |
| 20 | San Miguel County Estimated | 27 | +50% |
| 21 | Lake County Estimated | 23 | -61.7% |
| 22 | Yuma County Estimated | 14 | -72% |
| 23 | Grand County Estimated | 13 | -67.5% |
| 24 | Ouray County Estimated | 4 | +500% |
| 25 | Gilpin County Estimated | 0 | +100% |
| 26 | Kiowa County Estimated | -1 | -120% |
| 26 | Park County Estimated | -1 | -103% |
| 26 | Saguache County Estimated | -1 | +83.3% |
| 29 | Archuleta County Estimated | -2 | -133.3% |
| 29 | San Juan County Estimated | -2 | +50% |
| 31 | Cheyenne County Estimated | -3 | |
| 31 | Conejos County Estimated | -3 | -117.6% |
| 31 | Costilla County Estimated | -3 | -142.9% |
| 31 | Hinsdale County Estimated | -3 | -200% |
| 31 | La Plata County Estimated | -3 | -107.5% |
| 31 | Mineral County Estimated | -3 | +25% |
| 37 | Rio Blanco County Estimated | -9 | -200% |
| 38 | Jackson County Estimated | -10 | |
| 39 | Kit Carson County Estimated | -12 | -160% |
| 40 | Dolores County Estimated | -14 | -380% |
| 41 | Moffat County Estimated | -15 | -127.3% |
| 42 | Clear Creek County Estimated | -16 | +11.1% |
| 43 | Custer County Estimated | -18 | -260% |
| 44 | Chaffee County Estimated | -21 | +60.4% |
| 44 | Washington County Estimated | -21 | -600% |
| 46 | Lincoln County Estimated | -22 | -320% |
| 47 | Phillips County Estimated | -24 | -242.9% |
| 48 | Prowers County Estimated | -30 | -236.4% |
| 49 | Sedgwick County Estimated | -33 | -371.4% |
| 50 | Baca County Estimated | -35 | -250% |
| 51 | Crowley County Estimated | -36 | -71.4% |
| 52 | Bent County Estimated | -41 | -215.4% |
| 53 | Rio Grande County Estimated | -42 | -281.8% |
| 54 | Teller County Estimated | -72 | -60% |
| 55 | Las Animas County Estimated | -76 | -15.2% |
| 55 | Montezuma County Estimated | -76 | -8.6% |
| 57 | Huerfano County Estimated | -85 | -26.9% |
| 58 | Logan County Estimated | -114 | -11,500% |
| 59 | Otero County Estimated | -120 | -421.7% |
| 60 | Montrose County Estimated | -159 | -87.1% |
| 61 | Delta County Estimated | -184 | -19.5% |
| 62 | Fremont County Estimated | -312 | -33.3% |
| 63 | Mesa County Estimated | -362 | -293.5% |
| 64 | Pueblo County Estimated | -679 | -244.7% |
Other periods
About this ranking
Estimated births minus deaths of residents from July 1 of the previous year through June 30 of the reported year. A negative value means more deaths than births.
Equals births_july_june minus deaths_july_june for the same place and year. Not a calendar-year figure.
Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.
How to cite
U.S. Census Bureau. Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.Citation styles
APA 7
U.S. Census Bureau. (2026). Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021 (Counties in Colorado by natural change, July to June, 2021) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html
MLA 9
Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021, Counties in Colorado by natural change, July to June, 2021. U.S. Census Bureau, 26 Mar. 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/natural-change-july-june/colorado-counties?period=2021. Accessed 12 Oct. 2026.
Chicago (author-date)
U.S. Census Bureau. 2026. Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Counties in Colorado by natural change, July to June, 2021. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/natural-change-july-june/colorado-counties?period=2021.
Harvard
U.S. Census Bureau (2026) Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021, Counties in Colorado by natural change, July to June, 2021 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/natural-change-july-june/colorado-counties?period=2021 (Accessed: 12 October 2026).
BibTeX
@misc{census_counties_in_colorado_by_2021,
author = {{U.S. Census Bureau}},
title = {{Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021: Counties in Colorado by natural change, July to June, 2021}},
year = {2026},
howpublished = {Data set},
url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
urldate = {2026-10-12},
note = {Accessed via Invokely, https://invokely.ai/rankings/natural-change-july-june/colorado-counties?period=2021. Publisher attribution: U.S. Census Bureau. Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}
RIS
TY - DATA
AU - U.S. Census Bureau
TI - Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021: Counties in Colorado by natural change, July to June, 2021
PY - 2026
DA - 2026/03/26
PB - U.S. Census Bureau
DB - Invokely
UR - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2 - https://invokely.ai/rankings/natural-change-july-june/colorado-counties?period=2021
Y2 - 2026/10/12
N1 - Accessed via Invokely, https://invokely.ai/rankings/natural-change-july-june/colorado-counties?period=2021.
N1 - Publisher attribution: U.S. Census Bureau. Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER -
Use this data in your AI agent
Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:
Rank Counties in Colorado by natural change, July to June using official data, and cite the source.
rank_places {"indicator":"natural_change_july_june","level":"province","within":"Colorado","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=natural_change_july_june&level=province&within=Colorado&limit=10Questions
Which county has the highest natural change, July to June?
Denver County, with 3,958 in 2021, according to the U.S. Census Bureau.
Which county has the lowest natural change, July to June?
Pueblo County, with -679 in 2021.
Where does this ranking come from?
Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program: natural change (births minus deaths), July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Retrieved 2026-10-12.
Natural change, July to June: other rankings
Counties in Colorado: more rankings
- Net international migration, July to June
- Crude death rate, July to June
- School enrolment, children aged 3 and 4
- Hispanic or Latino population share
- Fair Market Rent, three bedrooms (HUD, monthly)
- Housing vacancy rate, all vacant units (US)
- Uninsured rate, ages 19 to 34 (US, ACS)
- Median gross rent (monthly)