Counties in Illinois by natural change, July to June
Cook County had the highest natural change, July to June of 102 counties in 2021, at 6,553. Madison County had the lowest, at -826. The median was -75 and the figure for Illinois was 3,394. Source: the U.S. Census Bureau.
Top 40 counties, 2021
Full ranking
| Rank | Counties | 2021 | Change on 2020 |
|---|---|---|---|
| 1 | Cook County Estimated | 6,553 | -52.6% |
| 2 | DuPage County Estimated | 2,249 | -18.6% |
| 3 | Kane County Estimated | 1,580 | -34.1% |
| 4 | Lake County Estimated | 1,354 | -23% |
| 5 | Will County Estimated | 1,265 | -36.2% |
| 6 | Kendall County Estimated | 696 | -15.3% |
| 7 | Champaign County Estimated | 464 | -31% |
| 8 | McHenry County Estimated | 394 | -30.6% |
| 9 | McLean County Estimated | 200 | -53.9% |
| 10 | DeKalb County Estimated | 110 | -64.3% |
| 11 | Peoria County Estimated | 52 | -89.4% |
| 12 | Boone County Estimated | 12 | -86.2% |
| 13 | Moultrie County Estimated | 6 | -25% |
| 14 | Clinton County Estimated | 1 | +102.9% |
| 15 | Cumberland County Estimated | -4 | +75% |
| 16 | Cass County Estimated | -7 | -150% |
| 17 | Grundy County Estimated | -8 | -107.3% |
| 18 | Putnam County Estimated | -9 | +67.9% |
| 19 | Jasper County Estimated | -12 | -163.2% |
| 20 | Douglas County Estimated | -13 | -129.5% |
| 21 | Calhoun County Estimated | -15 | +53.1% |
| 22 | Brown County Estimated | -17 | -666.7% |
| 23 | Pulaski County Estimated | -23 | +8% |
| 24 | Stark County Estimated | -26 | -52.9% |
| 25 | Scott County Estimated | -27 | -125% |
| 26 | Clay County Estimated | -28 | +28.2% |
| 27 | Menard County Estimated | -31 | +29.5% |
| 27 | Schuyler County Estimated | -31 | -93.8% |
| 29 | Pope County Estimated | -33 | -312.5% |
| 30 | Edwards County Estimated | -34 | -254.5% |
| 31 | Warren County Estimated | -40 | -671.4% |
| 32 | Effingham County Estimated | -41 | -151.3% |
| 33 | Fayette County Estimated | -42 | -1,300% |
| 33 | Gallatin County Estimated | -42 | +6.7% |
| 35 | Washington County Estimated | -48 | -4,700% |
| 36 | Hamilton County Estimated | -50 | -38.9% |
| 37 | Henderson County Estimated | -53 | -76.7% |
| 37 | Piatt County Estimated | -53 | -488.9% |
| 39 | Clark County Estimated | -54 | -86.2% |
| 40 | Bond County Estimated | -57 | -90% |
| 40 | Hardin County Estimated | -57 | -62.9% |
| 42 | Wabash County Estimated | -60 | -6,100% |
| 43 | Johnson County Estimated | -61 | -13% |
| 44 | Alexander County Estimated | -63 | -53.7% |
| 44 | Monroe County Estimated | -63 | -280% |
| 46 | Lawrence County Estimated | -65 | +15.6% |
| 47 | Richland County Estimated | -66 | -112.9% |
| 48 | De Witt County Estimated | -67 | -13.6% |
| 49 | Jackson County Estimated | -68 | -170.8% |
| 50 | Crawford County Estimated | -70 | -22.8% |
| 51 | Shelby County Estimated | -73 | -78% |
| 52 | Pike County Estimated | -77 | -581.3% |
| 53 | Livingston County Estimated | -79 | -307.9% |
| 53 | Wayne County Estimated | -79 | -229.2% |
| 55 | Woodford County Estimated | -82 | -228% |
| 56 | Greene County Estimated | -84 | -90.9% |
| 57 | Hancock County Estimated | -87 | -123.1% |
| 58 | Mercer County Estimated | -88 | -120% |
| 59 | McDonough County Estimated | -91 | -46.8% |
| 60 | Marshall County Estimated | -92 | -441.2% |
| 61 | Carroll County Estimated | -94 | -30.6% |
| 62 | Perry County Estimated | -95 | -33.8% |
| 63 | Ford County Estimated | -99 | -153.8% |
| 64 | Edgar County Estimated | -105 | -36.4% |
| 65 | Massac County Estimated | -106 | -130.4% |
| 66 | Sangamon County Estimated | -109 | +26.8% |
| 67 | Ogle County Estimated | -112 | -1,966.7% |
| 68 | Jo Daviess County Estimated | -114 | -2.7% |
| 69 | Union County Estimated | -120 | -96.7% |
| 70 | Lee County Estimated | -128 | -25.5% |
| 71 | Jefferson County Estimated | -131 | -197.7% |
| 72 | Morgan County Estimated | -136 | -100% |
| 73 | Jersey County Estimated | -138 | -1,433.3% |
| 74 | Mason County Estimated | -142 | -178.4% |
| 75 | Coles County Estimated | -148 | -159.6% |
| 76 | Randolph County Estimated | -150 | -15.4% |
| 77 | White County Estimated | -151 | -93.6% |
| 78 | Bureau County Estimated | -168 | -55.6% |
| 78 | Logan County Estimated | -168 | -460% |
| 80 | Iroquois County Estimated | -175 | -257.1% |
| 81 | Adams County Estimated | -184 | -12.9% |
| 81 | Henry County Estimated | -184 | -36.3% |
| 83 | Marion County Estimated | -187 | -605.4% |
| 84 | Saline County Estimated | -188 | -157.5% |
| 85 | Christian County Estimated | -205 | -272.7% |
| 86 | Montgomery County Estimated | -223 | -114.4% |
| 87 | Stephenson County Estimated | -225 | -78.6% |
| 88 | Kankakee County Estimated | -239 | -218.7% |
| 89 | Macon County Estimated | -246 | -2,136.4% |
| 90 | Fulton County Estimated | -257 | -41.2% |
| 91 | Williamson County Estimated | -261 | -77.6% |
| 92 | Whiteside County Estimated | -277 | -313.4% |
| 93 | Macoupin County Estimated | -280 | -84.2% |
| 94 | Winnebago County Estimated | -287 | -161.3% |
| 95 | Franklin County Estimated | -295 | -189.2% |
| 95 | St. Clair County Estimated | -295 | -600% |
| 97 | Knox County Estimated | -320 | -267.8% |
| 98 | Vermilion County Estimated | -329 | -225.7% |
| 99 | LaSalle County Estimated | -388 | -83.9% |
| 100 | Rock Island County Estimated | -440 | -393.3% |
| 101 | Tazewell County Estimated | -547 | -152.1% |
| 102 | Madison County Estimated | -826 | -202.6% |
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, 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 Illinois 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/illinois-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 Illinois 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/illinois-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 Illinois 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/illinois-counties?period=2021 (Accessed: 12 October 2026).
BibTeX
@misc{census_counties_in_illinois_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 Illinois 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/illinois-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 Illinois 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/illinois-counties?period=2021
Y2 - 2026/10/12
N1 - Accessed via Invokely, https://invokely.ai/rankings/natural-change-july-june/illinois-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 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 6,553 in 2021, according to the U.S. Census Bureau.
Which county has the lowest natural change, July to June?
Madison County, with -826 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.