Counties in Illinois by natural change, July to June
Cook County had the highest natural change, July to June of 102 counties in 2018, at 22,295. LaSalle County had the lowest, at -198. The median was -29 and the figure for Illinois was 37,433. Source: the U.S. Census Bureau.
Top 40 counties, 2018
Full ranking
| Rank | Counties | 2018 | Change on 2017 |
|---|---|---|---|
| 1 | Cook County Estimated | 22,295 | -7.8% |
| 2 | DuPage County Estimated | 4,073 | -4.1% |
| 3 | Kane County Estimated | 3,002 | -9.4% |
| 4 | Lake County Estimated | 2,670 | -5.3% |
| 5 | Will County Estimated | 2,631 | -4.9% |
| 6 | Champaign County Estimated | 944 | -2.6% |
| 7 | Kendall County Estimated | 932 | -1.1% |
| 8 | McHenry County Estimated | 824 | -20.2% |
| 9 | Peoria County Estimated | 692 | +4.1% |
| 10 | McLean County Estimated | 652 | -21.7% |
| 11 | St. Clair County Estimated | 576 | -1.5% |
| 12 | Winnebago County Estimated | 421 | -30.2% |
| 13 | DeKalb County Estimated | 344 | -2% |
| 14 | Grundy County Estimated | 182 | +11.7% |
| 15 | Sangamon County Estimated | 156 | -48.9% |
| 16 | Boone County Estimated | 96 | -44.2% |
| 17 | Jackson County Estimated | 88 | -57.1% |
| 18 | Kankakee County Estimated | 84 | -41.7% |
| 19 | Effingham County Estimated | 72 | -48.9% |
| 20 | Douglas County Estimated | 49 | +58.1% |
| 21 | Macon County Estimated | 47 | -42% |
| 22 | Clinton County Estimated | 43 | -29.5% |
| 23 | Monroe County Estimated | 39 | +5.4% |
| 24 | Cass County Estimated | 36 | -10% |
| 25 | Woodford County Estimated | 35 | +318.8% |
| 26 | Piatt County Estimated | 19 | +137.5% |
| 27 | Edwards County Estimated | 18 | +181.8% |
| 28 | Wabash County Estimated | 13 | +533.3% |
| 29 | Warren County Estimated | 12 | -70% |
| 30 | Fayette County Estimated | 11 | -52.2% |
| 31 | Jasper County Estimated | 10 | +433.3% |
| 32 | Pike County Estimated | 6 | +120% |
| 33 | Calhoun County Estimated | 2 | +111.8% |
| 34 | Moultrie County Estimated | 1 | -94.1% |
| 34 | Putnam County Estimated | 1 | +105.6% |
| 36 | Brown County Estimated | -2 | +80% |
| 36 | Scott County Estimated | -2 | +85.7% |
| 38 | Wayne County Estimated | -4 | +84% |
| 39 | Greene County Estimated | -7 | +86.3% |
| 40 | Pulaski County Estimated | -8 | -180% |
| 41 | Clay County Estimated | -9 | +66.7% |
| 42 | Washington County Estimated | -12 | -271.4% |
| 43 | Jefferson County Estimated | -13 | -136.1% |
| 44 | Rock Island County Estimated | -15 | -110.3% |
| 44 | Stark County Estimated | -15 | -15.4% |
| 46 | Vermilion County Estimated | -17 | -750% |
| 47 | Coles County Estimated | -18 | -160% |
| 48 | Cumberland County Estimated | -21 | -195.5% |
| 49 | Bond County Estimated | -24 | -9.1% |
| 50 | Clark County Estimated | -28 | -300% |
| 50 | Crawford County Estimated | -28 | -154.5% |
| 52 | Randolph County Estimated | -29 | -45% |
| 53 | Menard County Estimated | -30 | -3,100% |
| 54 | Pope County Estimated | -32 | -28% |
| 55 | Hancock County Estimated | -34 | +26.1% |
| 55 | Perry County Estimated | -34 | -25.9% |
| 57 | Montgomery County Estimated | -37 | +27.5% |
| 57 | Richland County Estimated | -37 | -184.6% |
| 59 | Edgar County Estimated | -38 | +29.6% |
| 59 | Henderson County Estimated | -38 | -111.1% |
| 59 | Lee County Estimated | -38 | -31% |
| 62 | Alexander County Estimated | -39 | -680% |
| 62 | Schuyler County Estimated | -39 | +36.1% |
| 64 | Tazewell County Estimated | -40 | -900% |
| 65 | Livingston County Estimated | -41 | -32.3% |
| 65 | Marion County Estimated | -41 | +38.8% |
| 67 | Ogle County Estimated | -42 | -450% |
| 68 | Carroll County Estimated | -44 | +31.3% |
| 68 | Hamilton County Estimated | -44 | -193.3% |
| 68 | McDonough County Estimated | -44 | -120% |
| 71 | Union County Estimated | -46 | +25.8% |
| 72 | Hardin County Estimated | -47 | +6% |
| 73 | Gallatin County Estimated | -49 | -63.3% |
| 74 | Henry County Estimated | -50 | +3.8% |
| 74 | Williamson County Estimated | -50 | -2% |
| 76 | Morgan County Estimated | -54 | -92.9% |
| 76 | Shelby County Estimated | -54 | -242.1% |
| 78 | De Witt County Estimated | -55 | -34.1% |
| 79 | Franklin County Estimated | -56 | -19.1% |
| 79 | Lawrence County Estimated | -56 | -51.4% |
| 81 | Ford County Estimated | -58 | -5.5% |
| 81 | Jo Daviess County Estimated | -58 | +43.1% |
| 81 | Johnson County Estimated | -58 | -132% |
| 84 | Massac County Estimated | -59 | +9.2% |
| 85 | Bureau County Estimated | -65 | +23.5% |
| 85 | Jersey County Estimated | -65 | +17.7% |
| 87 | Marshall County Estimated | -73 | -23.7% |
| 88 | Mercer County Estimated | -79 | -125.7% |
| 89 | White County Estimated | -83 | +3.5% |
| 90 | Adams County Estimated | -88 | -276% |
| 91 | Mason County Estimated | -93 | -121.4% |
| 92 | Logan County Estimated | -99 | -94.1% |
| 93 | Christian County Estimated | -100 | -7.5% |
| 93 | Iroquois County Estimated | -100 | -69.5% |
| 93 | Madison County Estimated | -100 | -180% |
| 96 | Knox County Estimated | -104 | -38.7% |
| 97 | Stephenson County Estimated | -106 | -35.9% |
| 98 | Saline County Estimated | -110 | -19.6% |
| 99 | Macoupin County Estimated | -134 | -2.3% |
| 100 | Fulton County Estimated | -176 | -54.4% |
| 100 | Whiteside County Estimated | -176 | -259.2% |
| 102 | LaSalle County Estimated | -198 | -167.6% |
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, 2018) [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, 2018. 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=2018. 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, 2018. 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=2018.
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, 2018 [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=2018 (Accessed: 12 October 2026).
BibTeX
@misc{census_counties_in_illinois_by_2018,
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, 2018}},
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=2018. 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, 2018
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=2018
Y2 - 2026/10/12
N1 - Accessed via Invokely, https://invokely.ai/rankings/natural-change-july-june/illinois-counties?period=2018.
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 22,295 in 2018, according to the U.S. Census Bureau.
Which county has the lowest natural change, July to June?
LaSalle County, with -198 in 2018.
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.