Population
As the Chicago metropolitan area has grown, more counties have been partly or totally assimilated with the taking of each decennial census.
| Census Area | 2010 Census | 2000 Census | 1990 Census | 1980 Census | 1970 Census | 1960 Census | 1950 Census | |
|---|---|---|---|---|---|---|---|---|
| Chicago- Naperville- Joliet, IL-IN-WI | MSA | 9,461,105 | 9,098,316 | 8,065,633 | 7,869,542 | 7,612,314 | 6,794,461 | 5,495,364 |
| Cook County, Illinois | MSA | 5,194,675 | 5,376,741 | 5,105,067 | 5,253,655 | 5,492,369 | 5,129,725 | 4,508,792 |
| DeKalb County, Illinois | MSA | 105,160 | 88,969 | 77,932 | 74,624 | 71,654 | 51,714 | 40,781 |
| DuPage County, Illinois | MSA | 916,924 | 904,161 | 781,666 | 658,835 | 491,882 | 313,459 | 154,599 |
| Grundy County, Illinois | MSA | 50,063 | 37,535 | 32,337 | 30,582 | 26,535 | 22,350 | 19,217 |
| Kane County, Illinois | MSA | 515,269 | 404,119 | 317,471 | 278,405 | 251,005 | 208,246 | 150,388 |
| Kendall County, Illinois | MSA | 114,736 | 54,544 | 39,413 | 37,202 | 26,374 | 17,540 | 12,115 |
| McHenry County, Illinois | MSA | 308,760 | 260,077 | 183,241 | 147,897 | 111,555 | 84,210 | 50,656 |
| Will County, Illinois | MSA | 677,560 | 502,266 | 357,313 | 324,460 | 249,498 | 191,617 | 134,336 |
| Jasper County, Indiana | MSA | 33,478 | 30,043 | 24,960 | 26,138 | 20,429 | 18,842 | 17,031 |
| Lake County, Indiana | MSA | 496,005 | 484,564 | 475,594 | 522,965 | 546,253 | 513,269 | 368,152 |
| Newton County, Indiana | MSA | 14,244 | 14,566 | 13,551 | 14,844 | 11,606 | 11,502 | 11,006 |
| Porter County, Indiana | MSA | 164,343 | 146,798 | 128,932 | 119,816 | 87,114 | 60,279 | 40,076 |
| Lake County, Illinois | MSA | 703,462 | 644,356 | 516,418 | 440,372 | 382,638 | 293,656 | 179,097 |
| Kenosha County, Wisconsin | MSA | 166,426 | 149,577 | 128,181 | 123,137 | 117,917 | 100,615 | 75,238 |
| Kankakee County, Illinois | CSA | 113,449 | 103,833 | 96,255 | 102,926 | 97,250 | 92,063 | 73,524 |
| LaPorte County, Indiana | CSA | 111,467 | 110,106 | 107,066 | 108,632 | 105,342 | 95,111 | 76,808 |
| Chicago- Naperville- Joliet, IL-IN-WI | CSA | 9,686,021 | 9,312,255 | 8,385,397 | 8,264,490 | 8,089,421 | 7,204,198 | 5,911,816 |
Counties highlighted in gray were not included in the MSA for that census. The CSA totals in blue are the totals of all the counties listed above, regardless of whether they were included in the Chicago Combined Statistical Area at the time.
Read more about this topic: Chicago Metropolitan Area
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—Rebecca Latimer Felton (1835–1930)