Counties in Illinois by natural change, July to June
Cook County had the highest natural change, July to June of 102 counties in 2019, at 18,558. LaSalle County had the lowest, at -212. The median was -16 and the figure for Illinois was 33,055. Source: the U.S. Census Bureau.
Top 40 counties, 2019
Full ranking
| Rank | Counties | 2019 | Change on 2018 |
|---|---|---|---|
| 1 | Cook County Estimated | 18,558 | -16.8% |
| 2 | DuPage County Estimated | 3,417 | -16.1% |
| 3 | Kane County Estimated | 2,699 | -10.1% |
| 4 | Will County Estimated | 2,409 | -8.4% |
| 5 | Lake County Estimated | 2,258 | -15.4% |
| 6 | Kendall County Estimated | 895 | -4% |
| 7 | McHenry County Estimated | 823 | -0.1% |
| 8 | Champaign County Estimated | 808 | -14.4% |
| 9 | Peoria County Estimated | 662 | -4.3% |
| 10 | Winnebago County Estimated | 569 | +35.2% |
| 11 | McLean County Estimated | 547 | -16.1% |
| 12 | DeKalb County Estimated | 385 | +11.9% |
| 13 | St. Clair County Estimated | 275 | -52.3% |
| 14 | Rock Island County Estimated | 223 | +1,586.7% |
| 15 | Jackson County Estimated | 159 | +80.7% |
| 16 | Sangamon County Estimated | 151 | -3.2% |
| 17 | Grundy County Estimated | 123 | -32.4% |
| 18 | Effingham County Estimated | 114 | +58.3% |
| 19 | Boone County Estimated | 74 | -22.9% |
| 20 | Woodford County Estimated | 63 | +80% |
| 21 | Monroe County Estimated | 61 | +56.4% |
| 22 | Douglas County Estimated | 54 | +10.2% |
| 23 | Jasper County Estimated | 51 | +410% |
| 24 | Macon County Estimated | 48 | +2.1% |
| 25 | Ogle County Estimated | 46 | +209.5% |
| 26 | Wabash County Estimated | 27 | +107.7% |
| 27 | Cass County Estimated | 24 | -33.3% |
| 27 | Kankakee County Estimated | 24 | -71.4% |
| 29 | Edwards County Estimated | 21 | +16.7% |
| 30 | Piatt County Estimated | 20 | +5.3% |
| 31 | Warren County Estimated | 19 | +58.3% |
| 32 | Clinton County Estimated | 12 | -72.1% |
| 32 | Washington County Estimated | 12 | +200% |
| 34 | Cumberland County Estimated | 11 | +152.4% |
| 35 | Brown County Estimated | 10 | +600% |
| 36 | Livingston County Estimated | 9 | +122% |
| 37 | Pike County Estimated | 8 | +33.3% |
| 38 | Fayette County Estimated | 7 | -36.4% |
| 38 | Vermilion County Estimated | 7 | +141.2% |
| 40 | Shelby County Estimated | 4 | +107.4% |
| 41 | Wayne County Estimated | 0 | +100% |
| 42 | Hamilton County Estimated | -1 | +97.7% |
| 43 | Menard County Estimated | -3 | +90% |
| 44 | Moultrie County Estimated | -7 | -800% |
| 45 | Pope County Estimated | -8 | +75% |
| 46 | Alexander County Estimated | -11 | +71.8% |
| 46 | Logan County Estimated | -11 | +88.9% |
| 48 | Clark County Estimated | -15 | +46.4% |
| 48 | Jefferson County Estimated | -15 | -15.4% |
| 48 | Putnam County Estimated | -15 | -1,600% |
| 48 | Whiteside County Estimated | -15 | +91.5% |
| 52 | Hardin County Estimated | -16 | +66% |
| 52 | Pulaski County Estimated | -16 | -100% |
| 54 | Marshall County Estimated | -17 | +76.7% |
| 55 | De Witt County Estimated | -18 | +67.3% |
| 55 | Hancock County Estimated | -18 | +47.1% |
| 57 | Henderson County Estimated | -21 | +44.7% |
| 57 | Scott County Estimated | -21 | -950% |
| 59 | Bond County Estimated | -22 | +8.3% |
| 60 | Schuyler County Estimated | -23 | +41% |
| 61 | Saline County Estimated | -25 | +77.3% |
| 62 | Richland County Estimated | -26 | +29.7% |
| 63 | Johnson County Estimated | -28 | +51.7% |
| 63 | Mason County Estimated | -28 | +69.9% |
| 65 | Calhoun County Estimated | -29 | -1,550% |
| 65 | Clay County Estimated | -29 | -222.2% |
| 65 | Greene County Estimated | -29 | -314.3% |
| 65 | Stark County Estimated | -29 | -93.3% |
| 69 | Jersey County Estimated | -30 | +53.8% |
| 70 | Crawford County Estimated | -33 | -17.9% |
| 71 | Christian County Estimated | -34 | +66% |
| 71 | Coles County Estimated | -34 | -88.9% |
| 73 | Marion County Estimated | -36 | +12.2% |
| 74 | Franklin County Estimated | -37 | +33.9% |
| 74 | Gallatin County Estimated | -37 | +24.5% |
| 76 | Mercer County Estimated | -38 | +51.9% |
| 77 | Stephenson County Estimated | -42 | +60.4% |
| 77 | Tazewell County Estimated | -42 | -5% |
| 79 | Union County Estimated | -44 | +4.3% |
| 80 | Iroquois County Estimated | -49 | +51% |
| 80 | Perry County Estimated | -49 | -44.1% |
| 82 | Ford County Estimated | -50 | +13.8% |
| 83 | Williamson County Estimated | -51 | -2% |
| 84 | Henry County Estimated | -58 | -16% |
| 84 | Lawrence County Estimated | -58 | -3.6% |
| 84 | Massac County Estimated | -58 | +1.7% |
| 87 | Lee County Estimated | -59 | -55.3% |
| 87 | Morgan County Estimated | -59 | -9.3% |
| 89 | McDonough County Estimated | -63 | -43.2% |
| 90 | Bureau County Estimated | -64 | +1.5% |
| 90 | Edgar County Estimated | -64 | -68.4% |
| 90 | Macoupin County Estimated | -64 | +52.2% |
| 93 | Carroll County Estimated | -66 | -50% |
| 94 | Adams County Estimated | -68 | +22.7% |
| 95 | Madison County Estimated | -72 | +28% |
| 96 | White County Estimated | -73 | +12% |
| 97 | Knox County Estimated | -77 | +26% |
| 98 | Montgomery County Estimated | -79 | -113.5% |
| 99 | Jo Daviess County Estimated | -98 | -69% |
| 100 | Randolph County Estimated | -105 | -262.1% |
| 101 | Fulton County Estimated | -133 | +24.4% |
| 102 | LaSalle County Estimated | -212 | -7.1% |
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, 2019) [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, 2019. 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=2019. 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, 2019. 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=2019.
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, 2019 [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=2019 (Accessed: 12 October 2026).
BibTeX
@misc{census_counties_in_illinois_by_2019,
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, 2019}},
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=2019. 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, 2019
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=2019
Y2 - 2026/10/12
N1 - Accessed via Invokely, https://invokely.ai/rankings/natural-change-july-june/illinois-counties?period=2019.
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 18,558 in 2019, according to the U.S. Census Bureau.
Which county has the lowest natural change, July to June?
LaSalle County, with -212 in 2019.
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.