Counties in Illinois by per capita personal income
Lake County had the highest per capita personal income of 102 counties in 2018, at $77,289. Lawrence County had the lowest, at $30,574. The median was $42,045 and the figure for Illinois was $56,073. Source: the U.S. Bureau of Economic Analysis.
Map of counties, 2018
- Under 37K
- 37K to 40K
- 40K to 42K
- 42K to 45K
- 45K to 49K
- 49K and over
Top 40 counties, 2018
Full ranking
Other periods
About this ranking
Personal income of the residents of a place divided by its resident population at mid-year, in current US dollars.
More on how it is measured
- Personal income is income from work, own businesses, property and government benefits, before income taxes.
- United States: Bureau of Economic Analysis regional accounts, tables SAINC1 for the nation and states and CAINC1 for counties.
An average, not a median: high incomes pull it up. It includes employer contributions to pensions and health insurance and government benefits, so it is higher than wages or household cash income. For the typical household use median_household_income. Not the same as gdp_per_capita_usd.
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. Bureau of Economic Analysis. CAINC1: county annual personal income summary, per capita personal income, current dollars, individual counties and county equivalents. https://apps.bea.gov/regional/zip/CAINC1.zip. Retrieved 2026-10-11.Citation styles
APA 7
U.S. Bureau of Economic Analysis. (2026). CAINC1: county annual personal income summary, per capita personal income, current dollars, individual counties and county equivalents (Counties in Illinois by per capita personal income, 2018) [Data set]. Retrieved October 11, 2026, from https://apps.bea.gov/regional/zip/CAINC1.zip
MLA 9
CAINC1: county annual personal income summary, per capita personal income, current dollars, individual counties and county equivalents, Counties in Illinois by per capita personal income, 2018. U.S. Bureau of Economic Analysis, 5 Feb. 2026, https://apps.bea.gov/regional/zip/CAINC1.zip. Invokely, https://invokely.ai/rankings/per-capita-personal-income/illinois-counties?period=2018. Accessed 11 Oct. 2026.
Chicago (author-date)
U.S. Bureau of Economic Analysis. 2026. CAINC1: county annual personal income summary, per capita personal income, current dollars, individual counties and county equivalents. Counties in Illinois by per capita personal income, 2018. Dataset. Accessed October 11, 2026. https://apps.bea.gov/regional/zip/CAINC1.zip. Also distributed by Invokely, https://invokely.ai/rankings/per-capita-personal-income/illinois-counties?period=2018.
Harvard
U.S. Bureau of Economic Analysis (2026) CAINC1: county annual personal income summary, per capita personal income, current dollars, individual counties and county equivalents, Counties in Illinois by per capita personal income, 2018 [Dataset]. Available at: https://apps.bea.gov/regional/zip/CAINC1.zip, via Invokely: https://invokely.ai/rankings/per-capita-personal-income/illinois-counties?period=2018 (Accessed: 11 October 2026).
BibTeX
@misc{bureau_counties_in_illinois_by_2018,
author = {{U.S. Bureau of Economic Analysis}},
title = {{CAINC1: county annual personal income summary, per capita personal income, current dollars, individual counties and county equivalents: Counties in Illinois by per capita personal income, 2018}},
year = {2026},
howpublished = {Data set},
url = {https://apps.bea.gov/regional/zip/CAINC1.zip},
urldate = {2026-10-11},
note = {Accessed via Invokely, https://invokely.ai/rankings/per-capita-personal-income/illinois-counties?period=2018. Publisher attribution: U.S. Bureau of Economic Analysis. CAINC1: county annual personal income summary, per capita personal income, current dollars, individual counties and county equivalents. https://apps.bea.gov/regional/zip/CAINC1.zip. Retrieved 2026-10-11.},
}
RIS
TY - DATA
AU - U.S. Bureau of Economic Analysis
TI - CAINC1: county annual personal income summary, per capita personal income, current dollars, individual counties and county equivalents: Counties in Illinois by per capita personal income, 2018
PY - 2026
DA - 2026/02/05
PB - U.S. Bureau of Economic Analysis
DB - Invokely
UR - https://apps.bea.gov/regional/zip/CAINC1.zip
L2 - https://invokely.ai/rankings/per-capita-personal-income/illinois-counties?period=2018
Y2 - 2026/10/11
N1 - Accessed via Invokely, https://invokely.ai/rankings/per-capita-personal-income/illinois-counties?period=2018.
N1 - Publisher attribution: U.S. Bureau of Economic Analysis. CAINC1: county annual personal income summary, per capita personal income, current dollars, individual counties and county equivalents. https://apps.bea.gov/regional/zip/CAINC1.zip. Retrieved 2026-10-11.
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 per capita personal income using official data, and cite the source.
rank_places {"indicator":"per_capita_personal_income","level":"province","within":"Illinois","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=per_capita_personal_income&level=province&within=Illinois&limit=10Questions
Which county has the highest per capita personal income?
Lake County, with $77,289 in 2018, according to the U.S. Bureau of Economic Analysis.
Which county has the lowest per capita personal income?
Lawrence County, with $30,574 in 2018.
Where does this ranking come from?
Every value comes from one source and one period, so the places are comparable: U.S. Bureau of Economic Analysis, CAINC1: county annual personal income summary, per capita personal income, current dollars, individual counties and county equivalents. Retrieved 2026-10-11.