Counties in Illinois by natural change, July to June
Cook County had the highest natural change, July to June of 102 counties in 2015, at 28,754. Knox County had the lowest, at -128. The median was -9 and the figure for Illinois was 51,693. Source: the U.S. Census Bureau.
Map of counties, 2015
- Under 0
- 0 to 300
- 300 and over
Top 40 counties, 2015
Full ranking
| Rank | Counties | 2015 | Change on 2014 |
|---|---|---|---|
| 1 | Cook County Estimated | 28,754 | -4.8% |
| 2 | DuPage County Estimated | 4,764 | -0.6% |
| 3 | Kane County Estimated | 3,602 | -5.6% |
| 4 | Will County Estimated | 3,600 | -2.5% |
| 5 | Lake County Estimated | 3,418 | +1.3% |
| 6 | McHenry County Estimated | 1,258 | +6.9% |
| 7 | Champaign County Estimated | 1,151 | -5% |
| 8 | Kendall County Estimated | 1,052 | -8.1% |
| 9 | St. Clair County Estimated | 960 | +12.8% |
| 10 | McLean County Estimated | 913 | -3% |
| 11 | Peoria County Estimated | 833 | -15.9% |
| 12 | Winnebago County Estimated | 593 | -12.8% |
| 13 | DeKalb County Estimated | 501 | +1.4% |
| 14 | Sangamon County Estimated | 358 | -15% |
| 15 | Rock Island County Estimated | 283 | -25.9% |
| 16 | Jackson County Estimated | 265 | +21.6% |
| 17 | Madison County Estimated | 236 | -28.9% |
| 18 | Kankakee County Estimated | 228 | -17.4% |
| 19 | Grundy County Estimated | 210 | -0.5% |
| 20 | Boone County Estimated | 208 | +10.1% |
| 21 | Tazewell County Estimated | 95 | -62.6% |
| 22 | Williamson County Estimated | 90 | +109.3% |
| 23 | Jefferson County Estimated | 87 | +234.6% |
| 24 | Effingham County Estimated | 67 | -31.6% |
| 25 | Clinton County Estimated | 64 | +8.5% |
| 26 | Douglas County Estimated | 56 | +55.6% |
| 27 | Whiteside County Estimated | 55 | +523.1% |
| 28 | Macon County Estimated | 45 | -48.3% |
| 29 | Monroe County Estimated | 38 | -26.9% |
| 30 | Jasper County Estimated | 30 | +275% |
| 31 | Cass County Estimated | 25 | +108.3% |
| 32 | Warren County Estimated | 24 | -17.2% |
| 33 | Fayette County Estimated | 20 | -55.6% |
| 33 | Henry County Estimated | 20 | +150% |
| 35 | Hancock County Estimated | 19 | +246.2% |
| 36 | Washington County Estimated | 15 | +400% |
| 37 | Woodford County Estimated | 13 | -81.2% |
| 38 | Saline County Estimated | 10 | +116.9% |
| 39 | Piatt County Estimated | 9 | -40% |
| 40 | Brown County Estimated | 6 | +146.2% |
| 41 | Wabash County Estimated | 4 | +157.1% |
| 42 | Putnam County Estimated | 3 | +127.3% |
| 43 | Adams County Estimated | 2 | -97.8% |
| 44 | Ogle County Estimated | 0 | -100% |
| 45 | Clay County Estimated | -1 | +92.9% |
| 46 | Morgan County Estimated | -3 | +86.4% |
| 47 | Alexander County Estimated | -4 | +33.3% |
| 47 | Calhoun County Estimated | -4 | -180% |
| 47 | Marion County Estimated | -4 | -33.3% |
| 50 | Edwards County Estimated | -6 | -175% |
| 51 | Cumberland County Estimated | -8 | -121.6% |
| 52 | Coles County Estimated | -9 | -190% |
| 52 | Hamilton County Estimated | -9 | +76.3% |
| 54 | Pope County Estimated | -12 | +14.3% |
| 54 | Scott County Estimated | -12 | -33.3% |
| 56 | Richland County Estimated | -15 | -7.1% |
| 56 | Stephenson County Estimated | -15 | +54.5% |
| 58 | Moultrie County Estimated | -16 | -188.9% |
| 59 | Marshall County Estimated | -17 | +66% |
| 59 | Schuyler County Estimated | -17 | +19% |
| 59 | Shelby County Estimated | -17 | -150% |
| 59 | Vermilion County Estimated | -17 | -131.5% |
| 63 | Gallatin County Estimated | -18 | +40% |
| 64 | Bureau County Estimated | -20 | +65.5% |
| 64 | De Witt County Estimated | -20 | -33.3% |
| 64 | Henderson County Estimated | -20 | -385.7% |
| 67 | Livingston County Estimated | -21 | +4.5% |
| 68 | Clark County Estimated | -22 | -214.3% |
| 68 | Pike County Estimated | -22 | +15.4% |
| 70 | Bond County Estimated | -24 | -71.4% |
| 71 | Johnson County Estimated | -25 | -2,400% |
| 71 | Lawrence County Estimated | -25 | -2,600% |
| 73 | Wayne County Estimated | -27 | +3.6% |
| 74 | Menard County Estimated | -28 | -833.3% |
| 75 | Carroll County Estimated | -29 | +50.8% |
| 76 | Stark County Estimated | -30 | -3,100% |
| 77 | Pulaski County Estimated | -33 | -312.5% |
| 78 | Mercer County Estimated | -37 | -15.6% |
| 79 | Crawford County Estimated | -38 | -40.7% |
| 79 | Logan County Estimated | -38 | -153.3% |
| 81 | Union County Estimated | -39 | +23.5% |
| 82 | Greene County Estimated | -41 | -720% |
| 83 | Hardin County Estimated | -42 | -20% |
| 84 | Lee County Estimated | -45 | -221.4% |
| 85 | Franklin County Estimated | -56 | -166.7% |
| 86 | Mason County Estimated | -60 | -93.5% |
| 87 | Ford County Estimated | -63 | -34% |
| 88 | Jo Daviess County Estimated | -64 | +22.9% |
| 89 | McDonough County Estimated | -65 | -564.3% |
| 90 | Perry County Estimated | -66 | -340% |
| 91 | Edgar County Estimated | -69 | -4.5% |
| 91 | Jersey County Estimated | -69 | -176% |
| 93 | White County Estimated | -70 | -25% |
| 94 | Massac County Estimated | -73 | -356.3% |
| 95 | Montgomery County Estimated | -75 | +1.3% |
| 96 | Christian County Estimated | -80 | -11.1% |
| 97 | Randolph County Estimated | -91 | -1,010% |
| 98 | Macoupin County Estimated | -97 | +28.1% |
| 99 | Iroquois County Estimated | -101 | -206.1% |
| 100 | Fulton County Estimated | -112 | +20% |
| 101 | LaSalle County Estimated | -122 | -87.7% |
| 102 | Knox County Estimated | -128 | -62% |
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 Illinois 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 Illinois 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/illinois-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 Illinois 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/illinois-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 Illinois 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/illinois-counties?period=2015 (Accessed: 12 October 2026).
BibTeX
@misc{census_counties_in_illinois_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 Illinois 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/illinois-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 Illinois 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/illinois-counties?period=2015
Y2 - 2026/10/12
N1 - Accessed via Invokely, https://invokely.ai/rankings/natural-change-july-june/illinois-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 Illinois by natural change, July to June using official data, and cite the source.
rank_places {"indicator":"natural_change_july_june","level":"province","within":"Illinois","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=natural_change_july_june&level=province&within=Illinois&limit=10Questions
Which county has the highest natural change, July to June?
Cook County, with 28,754 in 2015, according to the U.S. Census Bureau.
Which county has the lowest natural change, July to June?
Knox County, with -128 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.