There are 51 cities in DuPage County, Illinois.
Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | State | 2024 Population | 2020 Census | Annual Change | Density (mi²) | Area (mi²) |
|---|---|---|---|---|---|---|---|
| Chicago | 1 | Illinois | 2,590,002 | 2,740,076 | -1.43% | 11,372 | 227.75 |
| Aurora | 2 | Illinois | 175,535 | 180,197 | -0.66% | 3,896 | 45.05 |
| Naperville | 3 | Illinois | 150,456 | 149,416 | 0.17% | 3,842 | 39.16 |
| Bolingbrook | 4 | Illinois | 74,244 | 73,818 | 0.14% | 2,982 | 24.90 |
| Schaumburg | 5 | Illinois | 74,007 | 78,443 | -1.48% | 3,825 | 19.35 |
| Arlington Heights | 6 | Illinois | 72,943 | 77,447 | -1.52% | 4,391 | 16.61 |
| Des Plaines | 7 | Illinois | 56,706 | 60,482 | -1.64% | 3,983 | 14.24 |
| Wheaton | 8 | Illinois | 52,168 | 53,800 | -0.78% | 4,609 | 11.32 |
| Downers Grove | 9 | Illinois | 48,582 | 50,126 | -0.79% | 3,316 | 14.65 |
| Elmhurst | 10 | Illinois | 44,816 | 45,728 | -0.51% | 4,386 | 10.22 |
| Lombard | 11 | Illinois | 43,331 | 44,381 | -0.6% | 4,265 | 10.16 |
| Romeoville | 12 | Illinois | 40,360 | 39,874 | 0.3% | 2,089 | 19.32 |
| Bartlett | 13 | Illinois | 39,288 | 41,020 | -1.09% | 2,490 | 15.78 |
| Carol Stream | 14 | Illinois | 38,329 | 39,759 | -0.92% | 4,201 | 9.12 |
| Streamwood | 15 | Illinois | 36,859 | 39,443 | -1.72% | 4,721 | 7.81 |
| Hanover Park | 16 | Illinois | 35,402 | 37,350 | -1.36% | 5,513 | 6.42 |
| Addison | 17 | Illinois | 34,617 | 35,637 | -0.73% | 3,522 | 9.83 |
| Woodridge | 18 | Illinois | 33,065 | 34,109 | -0.78% | 3,433 | 9.63 |
| St. Charles | 19 | Illinois | 32,467 | 33,033 | -0.43% | 2,245 | 14.46 |
| Glendale Heights | 20 | Illinois | 31,865 | 33,103 | -0.96% | 5,907 | 5.39 |
| Elk Grove Village | 21 | Illinois | 30,612 | 32,706 | -1.68% | 2,647 | 11.56 |
| Glen Ellyn | 22 | Illinois | 27,895 | 28,833 | -0.83% | 4,047 | 6.89 |
| Batavia | 23 | Illinois | 26,032 | 26,212 | -0.17% | 2,393 | 10.88 |
| West Chicago | 24 | Illinois | 24,774 | 25,558 | -0.78% | 1,610 | 15.39 |
| Homer Glen | 25 | Illinois | 24,388 | 24,504 | -0.12% | 1,098 | 22.21 |
| Westmont | 26 | Illinois | 23,571 | 24,381 | -0.85% | 4,700 | 5.01 |
| Rolling Meadows | 27 | Illinois | 23,018 | 24,110 | -1.17% | 4,099 | 5.62 |
| Lisle | 28 | Illinois | 22,848 | 23,668 | -0.89% | 3,313 | 6.90 |
| Bloomingdale | 29 | Illinois | 22,299 | 22,349 | -0.05% | 3,296 | 6.77 |
| Roselle | 30 | Illinois | 22,088 | 22,922 | -0.93% | 3,994 | 5.53 |
| Villa Park | 31 | Illinois | 21,378 | 22,204 | -0.95% | 4,527 | 4.72 |
| Darien | 32 | Illinois | 21,171 | 21,997 | -0.96% | 3,432 | 6.17 |
| Geneva | 33 | Illinois | 21,100 | 21,356 | -0.3% | 2,115 | 9.98 |
| North Aurora | 34 | Illinois | 18,526 | 18,280 | 0.34% | 2,445 | 7.58 |
| Bensenville | 35 | Illinois | 18,049 | 18,755 | -0.97% | 3,263 | 5.53 |
| Lemont | 36 | Illinois | 17,399 | 17,663 | -0.38% | 2,054 | 8.47 |
| Hinsdale | 37 | Illinois | 17,097 | 17,373 | -0.4% | 3,698 | 4.62 |
| Warrenville | 38 | Illinois | 16,050 | 13,632 | 3.92% | 2,938 | 5.46 |
| Wood Dale | 39 | Illinois | 13,484 | 13,944 | -0.85% | 2,816 | 4.79 |
| Burr Ridge | 40 | Illinois | 10,892 | 11,182 | -0.66% | 1,458 | 7.47 |
| Winfield | 41 | Illinois | 10,279 | 9,813 | 1.15% | 3,321 | 3.10 |
| Itasca | 42 | Illinois | 9,203 | 9,521 | -0.85% | 1,833 | 5.02 |
| Willowbrook | 43 | Illinois | 8,902 | 9,210 | -0.86% | 3,457 | 2.58 |
| Clarendon Hills | 44 | Illinois | 8,451 | 8,691 | -0.7% | 4,669 | 1.81 |
| Oak Brook | 45 | Illinois | 7,901 | 8,149 | -0.78% | 991 | 7.98 |
| Hillside | 46 | Illinois | 7,728 | 8,282 | -1.75% | 2,439 | 3.17 |
| Willow Springs | 47 | Illinois | 5,649 | 5,841 | -0.84% | 1,362 | 4.15 |
| Palos Park | 48 | Illinois | 4,685 | 4,899 | -1.12% | 726 | 6.45 |
| Indian Head Park | 49 | Illinois | 3,813 | 4,057 | -1.57% | 4,091 | 0.93 |
| Oakbrook Terrace | 50 | Illinois | 2,646 | 2,742 | -0.9% | 2,023 | 1.31 |
| Wayne | 51 | Illinois | 2,193 | 2,281 | -0.99% | 383 | 5.73 |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Chicago is the largest city in DuPage County.
Wayne is the smallest city in DuPage County.
There are 51 cities in DuPage County, Illinois.