Illinois statistical areas
From Wikipedia, the free encyclopedia
The U.S. State of Illinois currently has 47 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated 14 combined statistical areas, 12 metropolitan statistical areas, and 21 micropolitan statistical areas in Illinois.[1] As of 2025, the largest of these is the Chicago–Naperville, IL-IN-WI CSA, comprising the area around Illinois' largest city, Chicago.
The Office of Management and Budget (OMB) has designated more than 1,000 statistical areas for the United States and Puerto Rico.[2] These statistical areas are important geographic delineations of population clusters used by the OMB, the United States Census Bureau, planning organizations, and federal, state, and local government entities.
Statistical areas
The OMB defines a core-based statistical area (CBSA) as the county or counties (or county-equivalents) surrounding at least one densely-settled core of at least 10,000 population,[2] "plus adjacent counties having a high degree of social and economic integration with the core as measured through commuting ties with the counties containing the core".[2] The OMB further divides a CBSA based on population into a metropolitan statistical area (MSA) for those with at least 50,000 people or a micropolitan statistical area (μSA) for those with 10,000 to 49,999 people.[2]
The OMB defines a combined statistical area (CSA) as two or more adjacent CBSAs where the employment interchange rate (percent commuting from A to B plus percent commuting from B to A) is at least 15%.[2] A primary statistical area (PSA) includes all CSAs and any CBSA that is not a constituent of a combined statistical area.
| 2025 rank | Core-based statistical area[1] | Population | ||||
|---|---|---|---|---|---|---|
| 2025 estimate[3] | Change | 2020 Census[4] | Change | 2010 Census[5] | ||
| 1 | Chicago–Naperville–Elgin, IL-IN MSA (IL) | 8,705,380 | −0.29% | 8,730,688 | +1.68% | 8,586,609 |
| 2 | St. Louis, MO-IL MSA (IL) | 671,953 | −1.58% | 682,761 | −2.97% | 703,664 |
| 3 | Peoria, IL MSA | 363,505 | −1.43% | 368,782 | −2.74% | 379,186 |
| 4 | Rockford, IL MSA | 337,242 | −0.46% | 338,798 | −3.04% | 349,431 |
| 5 | Champaign–Urbana, IL MSA | 239,979 | +1.66% | 236,072 | +1.80% | 231,891 |
| 6 | Springfield, IL MSA | 206,033 | −1.25% | 208,640 | −0.73% | 210,170 |
| 7 | Davenport–Moline–Rock Island, IA-IL MSA (IL) | 205,193 | −2.13% | 209,655 | −1.77% | 213,442 |
| 8 | Bloomington, IL MSA | 171,419 | +0.27% | 170,954 | +0.81% | 169,572 |
| 9 | Ottawa, IL μSA | 145,902 | −1.78% | 148,539 | −4.11% | 154,908 |
| 10 | Kankakee, IL MSA | 105,525 | −1.84% | 107,502 | −5.24% | 113,449 |
| 11 | Decatur, IL MSA | 99,300 | −4.52% | 103,998 | −6.11% | 110,768 |
| 12 | Danville, IL μSA | 71,259 | −3.95% | 74,188 | −9.11% | 81,625 |
| 13 | Marion–Herrin, IL μSA | 67,225 | +0.11% | 67,153 | +1.20% | 66,357 |
| 14 | Quincy, IL-MO μSA (IL) | 64,267 | −2.24% | 65,737 | −2.04% | 67,103 |
| 15 | Sterling, IL μSA | 54,121 | −2.82% | 55,691 | −4.80% | 58,498 |
| 16 | Carbondale, IL μSA | 52,501 | −0.89% | 52,974 | −12.03% | 60,218 |
| 17 | Rochelle, IL μSA | 51,399 | −0.75% | 51,788 | −3.19% | 53,497 |
| 18 | Galesburg, IL μSA | 47,767 | −4.40% | 49,967 | −5.58% | 52,919 |
| 19 | Charleston–Mattoon, IL μSA | 46,607 | −0.55% | 46,863 | −13.01% | 53,873 |
| 20 | Effingham, IL μSA | 44,727 | −0.87% | 45,118 | −0.38% | 45,290 |
| 21 | Freeport, IL μSA | 43,220 | −3.16% | 44,630 | −6.46% | 47,711 |
| 22 | Jacksonville, IL μSA | 37,381 | −1.28% | 37,864 | −7.43% | 40,902 |
| 23 | Centralia, IL μSA | 36,382 | −3.57% | 37,729 | −4.33% | 39,437 |
| 24 | Mount Vernon, IL μSA | 36,147 | −2.60% | 37,113 | −4.41% | 38,827 |
| 25 | Pontiac, IL μSA | 35,057 | −2.12% | 35,815 | −8.05% | 38,950 |
| 26 | Taylorville, IL μSA | 33,443 | −1.73% | 34,032 | −2.21% | 34,800 |
| 27 | Canton, IL μSA | 32,901 | −2.11% | 33,609 | −9.33% | 37,069 |
| 28 | Lincoln, IL μSA | 27,182 | −2.88% | 27,987 | −7.65% | 30,305 |
| 29 | Macomb, IL μSA | 25,916 | −4.85% | 27,238 | −16.48% | 32,612 |
| 30 | Paducah, KY-IL μSA (IL) | 13,502 | −4.71% | 14,169 | −8.17% | 15,429 |
| 31 | Burlington, IA-IL μSA (IL) | 5,984 | −6.31% | 6,387 | −12.88% | 7,331 |
| 32 | Cape Girardeau, MO-IL μSA (IL) | 4,570 | −12.79% | 5,240 | −36.39% | 8,238 |
| Burlington, IA-IL μSA | 44,061 | −2.73% | 45,297 | −4.95% | 47,656 | |
| Cape Girardeau, MO-IL μSA | 99,215 | +1.74% | 97,517 | +1.29% | 96,275 | |
| Chicago–Naperville–Elgin, IL-IN MSA | 9,434,123 | −0.16% | 9,449,351 | +1.66% | 9,294,679 | |
| Davenport–Moline–Rock Island, IA-IL MSA | 380,452 | −1.01% | 384,324 | +1.49% | 378,666 | |
| Paducah, KY-IL μSA | 102,259 | −1.19% | 103,486 | −0.37% | 103,866 | |
| Quincy, IL-MO μSA | 74,146 | −2.14% | 75,769 | −2.00% | 77,314 | |
| St. Louis, MO-IL MSA | 2,814,421 | −0.21% | 2,820,253 | +1.17% | 2,787,701 | |
| 2025 rank | Combined statistical area[1] | Population | ||||
|---|---|---|---|---|---|---|
| 2025 estimate[3] | Change | 2020 Census[4] | Change | 2010 Census[5] | ||
| 1 | Chicago–Naperville, IL-IN-WI CSA (IL) | 8,956,807 | −0.33% | 8,986,729 | +1.49% | 8,854,966 |
| 2 | St. Louis–St. Charles–Farmington, MO-IL CSA (IL) | 708,335 | −1.69% | 720,490 | −3.04% | 743,101 |
| 3 | Rockford–Freeport–Rochelle, IL CSA | 431,861 | −0.77% | 435,216 | −3.42% | 450,639 |
| 4 | Peoria–Canton, IL CSA | 396,406 | −1.49% | 402,391 | −3.33% | 416,255 |
| 5 | Champaign–Urbana–Danville, IL CSA | 311,238 | +0.32% | 310,260 | −1.04% | 313,516 |
| 6 | Springfield–Jacksonville–Lincoln, IL CSA | 304,039 | −1.45% | 308,523 | −2.42% | 316,177 |
| 7 | Bloomington–Pontiac, IL CSA | 206,476 | −0.14% | 206,769 | −0.84% | 208,522 |
| 8 | Davenport–Moline, IA-IL CSA (IL) | 205,193 | −2.13% | 209,655 | −1.77% | 213,442 |
| 9 | Carbondale–Marion–Herrin, IL CSA | 119,726 | −0.33% | 120,127 | −5.09% | 126,575 |
| 10 | Dixon–Sterling, IL CSA | 87,035 | −3.12% | 89,836 | −4.96% | 94,529 |
| 11 | Quincy–Hannibal, IL-MO CSA (IL) | 64,267 | −2.24% | 65,737 | −2.04% | 67,103 |
| 12 | Paducah–Mayfield, KY-IL CSA (IL) | 13,502 | −4.71% | 14,169 | −8.17% | 15,429 |
| 13 | Burlington–Fort Madison, IA-IL CSA (IL) | 5,984 | −6.31% | 6,387 | −12.88% | 7,331 |
| 14 | Cape Girardeau–Sikeston, MO-IL CSA (IL) | 4,570 | −12.79% | 5,240 | −36.39% | 8,238 |
| Burlington–Fort Madison, IA-IL CSA | 76,367 | −3.15% | 78,852 | −5.59% | 83,518 | |
| Cape Girardeau–Sikeston, MO-IL CSA | 149,193 | +0.70% | 148,153 | −1.12% | 149,824 | |
| Chicago–Naperville, IL-IN-WI CSA | 9,965,292 | −0.22% | 9,986,960 | +1.48% | 9,840,929 | |
| Davenport–Moline, IA-IL CSA | 468,307 | −1.21% | 474,019 | +0.74% | 470,527 | |
| Paducah–Mayfield, KY-IL CSA | 139,309 | −0.59% | 140,135 | −0.60% | 140,987 | |
| Quincy–Hannibal, IL-MO CSA | 113,115 | −1.34% | 114,649 | −1.39% | 116,262 | |
| St. Louis–St. Charles–Farmington, MO-IL CSA | 2,918,612 | −0.22% | 2,924,904 | +1.12% | 2,892,497 | |
See also
Notes
- An out-of-state area and its population are displayed in green. An area that extends into more than one state is displayed in purple. A purple population number over a black population number show the total population versus the in-state population. The state's abbreviation is also shown next to the in-state total.
- Per the most recent OMB bulletin, the portion of Sullivan, Missouri within Crawford County, Missouri is included in St. Louis' statistical areas. Population data for this portion of Sullivan is not readily available and is not included in this table.
- For CBSAs comprising populations from multiple states, they are listed twice to show both their intrastate population within that CBSA as well as the CBSA's total population. Only the intrastate population is ranked.
- For CSAs comprising populations from multiple states, they are listed twice to show both their intrastate population within that CSA as well as the CSA's total population. Only the intrastate population is ranked.
