Counties in Colorado by natural change, July to June
El Paso County had the highest natural change, July to June of 64 counties in 2015, at 5,310. Fremont County had the lowest, at -165. The median was 28 and the figure for Colorado was 30,103. Source: the U.S. Census Bureau.
Top 40 counties, 2015
Full ranking
| Rank | Counties | 2015 | Change on 2014 |
|---|---|---|---|
| 1 | El Paso County Estimated | 5,310 | +3.6% |
| 2 | Denver County Estimated | 5,060 | -1.8% |
| 3 | Adams County Estimated | 4,425 | +1.5% |
| 4 | Arapahoe County Estimated | 4,391 | -0.6% |
| 5 | Weld County Estimated | 2,356 | +0.7% |
| 6 | Douglas County Estimated | 2,114 | -15.6% |
| 7 | Jefferson County Estimated | 1,436 | -21.1% |
| 8 | Larimer County Estimated | 1,188 | -21.6% |
| 9 | Boulder County Estimated | 1,075 | -13.1% |
| 10 | Eagle County Estimated | 533 | -0.9% |
| 11 | Garfield County Estimated | 419 | -13.8% |
| 12 | Mesa County Estimated | 328 | -12.5% |
| 13 | Broomfield County Estimated | 308 | -11.7% |
| 14 | La Plata County Estimated | 220 | -10.9% |
| 15 | Summit County Estimated | 202 | +1% |
| 16 | Morgan County Estimated | 191 | +1.1% |
| 17 | Pueblo County Estimated | 150 | -50% |
| 18 | Routt County Estimated | 114 | +8.6% |
| 19 | Moffat County Estimated | 96 | +14.3% |
| 20 | Alamosa County Estimated | 79 | -27.5% |
| 21 | Pitkin County Estimated | 75 | -2.6% |
| 22 | Montezuma County Estimated | 74 | +34.5% |
| 23 | Elbert County Estimated | 67 | +21.8% |
| 24 | Gunnison County Estimated | 60 | -24.1% |
| 25 | San Miguel County Estimated | 44 | 0% |
| 26 | Lake County Estimated | 42 | +16.7% |
| 26 | Yuma County Estimated | 42 | -33.3% |
| 28 | Kit Carson County Estimated | 38 | +137.5% |
| 29 | Prowers County Estimated | 36 | -16.3% |
| 30 | Logan County Estimated | 35 | +1,850% |
| 31 | Grand County Estimated | 34 | -41.4% |
| 32 | Rio Blanco County Estimated | 31 | +158.3% |
| 33 | Park County Estimated | 24 | +71.4% |
| 34 | Conejos County Estimated | 22 | -59.3% |
| 35 | Saguache County Estimated | 18 | +100% |
| 36 | Archuleta County Estimated | 17 | +30.8% |
| 37 | Teller County Estimated | 14 | -30% |
| 38 | Lincoln County Estimated | 9 | +80% |
| 39 | Cheyenne County Estimated | 8 | -33.3% |
| 40 | Gilpin County Estimated | 6 | -40% |
| 41 | Dolores County Estimated | 5 | +135.7% |
| 42 | Crowley County Estimated | 4 | +125% |
| 43 | Jackson County Estimated | 2 | -50% |
| 44 | San Juan County Estimated | 1 | -75% |
| 45 | Phillips County Estimated | 0 | -100% |
| 45 | Rio Grande County Estimated | 0 | -100% |
| 47 | Clear Creek County Estimated | -1 | -105.9% |
| 47 | Hinsdale County Estimated | -1 | -125% |
| 47 | Washington County Estimated | -1 | +80% |
| 50 | Costilla County Estimated | -3 | +83.3% |
| 50 | Mineral County Estimated | -3 | -400% |
| 52 | Ouray County Estimated | -5 | +50% |
| 53 | Montrose County Estimated | -6 | -107% |
| 54 | Custer County Estimated | -8 | +38.5% |
| 55 | Kiowa County Estimated | -9 | -800% |
| 56 | Bent County Estimated | -14 | +26.3% |
| 57 | Baca County Estimated | -25 | -92.3% |
| 58 | Sedgwick County Estimated | -31 | -416.7% |
| 59 | Huerfano County Estimated | -50 | +3.8% |
| 60 | Las Animas County Estimated | -52 | -10.6% |
| 61 | Otero County Estimated | -54 | -12.5% |
| 62 | Chaffee County Estimated | -65 | -150% |
| 63 | Delta County Estimated | -107 | -57.4% |
| 64 | Fremont County Estimated | -165 | -2.5% |
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, 2015) [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, 2015. 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=2015. 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, 2015. 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=2015.
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, 2015 [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=2015 (Accessed: 12 October 2026).
BibTeX
@misc{census_counties_in_colorado_by_2015,
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, 2015}},
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=2015. 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, 2015
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=2015
Y2 - 2026/10/12
N1 - Accessed via Invokely, https://invokely.ai/rankings/natural-change-july-june/colorado-counties?period=2015.
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?
El Paso County, with 5,310 in 2015, according to the U.S. Census Bureau.
Which county has the lowest natural change, July to June?
Fremont County, with -165 in 2015.
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)