Area Code Profile
331, IL
Browse ZIP codes and key stats for 331, Illinois: population, households, income, education, health coverage, and more.
Area Code details
Local time 00:34:28(CT)| Location | 331, IL |
|---|---|
| Population (ZIP areas) | 1,442,719(sum of local ZIP code populations) |
| Total ZIP codes | 58total |
| ZIP codes (by type) | 54 Standard4 PO Box |
| Overlay codes | |
| Cities Covered | |
| Counties Covered |
Map of area code 331
ZIP codes in area code 331
58 ZIP codes covered by this area code.
Cities served by area code 331
47 cities covered by this area code.
| City | ZIP codes | Median incomeHousehold | Population |
|---|---|---|---|
| Aurora | 10 | $93,633 | 180,542 |
| Naperville | 6 | $155,105 | 149,540 |
| Bolingbrook | 2 | $108,400 | 73,922 |
| Wheaton | 2 | $120,008 | 53,970 |
| Downers Grove | 2 | $115,114 | 50,247 |
| Elmhurst | 1 | $149,644 | 45,786 |
| Plainfield | 3 | $144,000 | 44,762 |
| Lombard | 1 | $100,362 | 44,476 |
| Carol Stream | 7 | $102,309 | 39,854 |
| Addison | 1 | $90,431 | 35,702 |
| Oswego | 1 | $123,792 | 34,585 |
| Woodridge | 1 | $101,000 | 34,158 |
| Glendale Heights | 1 | $86,545 | 33,176 |
| Saint Charles | 2 | $114,300 | 33,081 |
| Glen Ellyn | 2 | $140,938 | 28,846 |
| Batavia | 1 | $120,056 | 26,098 |
| West Chicago | 2 | $99,927 | 25,614 |
| Westmont | 1 | $88,090 | 24,429 |
| Lisle | 1 | $107,479 | 24,223 |
| Villa Park | 1 | $95,015 | 22,263 |
| Darien | 1 | $111,215 | 22,011 |
| Yorkville | 1 | $108,513 | 21,533 |
| Geneva | 1 | $144,341 | 21,393 |
| Montgomery | 1 | $103,734 | 20,262 |
| Bensenville | 2 | $79,515 | 18,813 |
| North Aurora | 1 | $114,305 | 18,261 |
| Lemont | 1 | $123,370 | 17,629 |
| Hinsdale | 2 | $250,001 | 17,395 |
| Wood Dale | 2 | $91,382 | 14,012 |
| Warrenville | 1 | $100,321 | 13,553 |
| Plano | 1 | $86,271 | 11,847 |
| Winfield | 1 | $135,795 | 9,835 |
| Itasca | 1 | $114,294 | 9,543 |
| Sugar Grove | 1 | $121,207 | 9,278 |
| Willowbrook | 1 | $99,239 | 9,236 |
| Clarendon Hills | 1 | $130,388 | 8,702 |
| Oak Brook | 1 | $175,870 | 8,163 |
| Elburn | 1 | $127,731 | 6,175 |
| Wayne | 1 | $161,719 | 2,286 |
| Maple Park | 1 | $107,045 | 1,433 |
| Bristol | 1 | — | 1,165 |
| Big Rock | 1 | $162,854 | 1,104 |
| Kaneville | 1 | $86,875 | 452 |
| Millbrook | 1 | $137,560 | 277 |
| Mooseheart | 1 | — | 275 |
| Eola | 1 | — | 76 |
| Wasco | 1 | — | 71 |
Counties served by area code 331
6 counties covered by this area code.
| County | ZIP codes | Median incomeHousehold | Population |
|---|---|---|---|
| Cook County | 216 | $83,498 | 5,275,541 |
| DuPage County | 49 | $112,096 | 932,877 |
| Will County | 29 | $109,984 | 696,355 |
| Kane County | 32 | $103,163 | 516,522 |
| Kendall County | 7 | $111,601 | 131,869 |
| DeKalb County | 14 | $70,724 | 100,420 |
Data Sources & Citations
The geographic and demographic information presented on this site is compiled from publicly available, authoritative sources, including:
- United States Census BureauDemographic, population, housing, and socioeconomic data sourced from Census Bureau datasets, including the Decennial Census and the American Community Survey (ACS).Census Data
- United States Postal Service (USPS)ZIP code classifications, delivery types, and postal designations used for reference purposes. USPS ZIP codes are intended for mail delivery and may not always align exactly with Census geographic boundaries.USPS