First three digits · Illinois
ZIP Codes Starting with
65 ZIP codes start with 605, sorted at the Fox Valley, IL (SCF 605) sectional center (USPS labeling list L005, effective October 1, 2026) in Illinois: 56 residential ZIP codes across 8 counties and 9 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 605 mean?
The first digit, 6, is one of ten national areas (Illinois, Kansas, Missouri and Nebraska). The first three, 605, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 605 to the Fox Valley, IL (SCF 605) facility. The last two digits pick the delivery area. By residents, the largest town names among the 605 ZIP codes are Aurora, Naperville, Plainfield, Downers Grove, Oswego and Woodridge.
605 is the only prefix the Fox Valley, IL (SCF 605) facility sorts.
Where are the 605 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 605
| County | ||||||
|---|---|---|---|---|---|---|
| 60501 | Summit Argo | Cook County | 11,432 | 2,624 | $63k | $234k |
| 60502 | Aurora | DuPage County | 23,308 | 2,086 | $157k | $412k |
| 60503 | Aurora | Will County | 16,789 | 3,927 | $137k | $325k |
| 60504 | Aurora | DuPage County | 39,358 | 4,482 | $98k | $287k |
| 60505 | Aurora | Kane County | 57,199 | 5,640 | $73k | $205k |
| 60506 | Aurora | Kane County | 50,038 | 2,353 | $80k | $254k |
| 60507 | Aurora | Kane County | PO Box or unique | – | – | – |
| 60510 | Batavia | Kane County | 29,038 | 1,190 | $122k | $392k |
| 60511 | Big Rock | Kane County | 2,081 | 70 | $159k | $338k |
| 60512 | Bristol | Kendall County | 1,090 | 166 | $97k | $352k |
| 60513 | Brookfield | Cook County | 19,343 | 6,131 | $110k | $332k |
| 60514 | Clarendon Hills | DuPage County | 9,918 | 4,867 | $119k | $566k |
| 60515 | Downers Grove | DuPage County | 29,762 | 2,519 | $123k | $461k |
| 60516 | Downers Grove | DuPage County | 28,062 | 3,701 | $116k | $441k |
| 60517 | Woodridge | DuPage County | 33,156 | 3,556 | $99k | $362k |
| 60518 | Earlville | LaSalle County | 3,289 | 25 | $70k | $166k |
| 60519 | Eola | DuPage County | 61 | 1,173 | $136k | – |
| 60520 | Hinckley | DeKalb County | 2,979 | 66 | $99k | $321k |
| 60521 | Hinsdale | DuPage County | 18,056 | 3,817 | $249k | $1.03M |
| 60522 | Hinsdale | DuPage County | PO Box or unique | – | – | – |
| 60523 | Oak Brook | DuPage County | 10,144 | 1,133 | $118k | $782k |
| 60525 | La Grange | Cook County | 31,324 | 2,399 | $117k | $438k |
| 60526 | La Grange Park | Cook County | 13,459 | 3,467 | $120k | $440k |
| 60527 | Willowbrook | DuPage County | 29,028 | 2,016 | $107k | $502k |
| 60530 | Lee | Lee County | 992 | 36 | $96k | $265k |
| 60531 | Leland | LaSalle County | 1,885 | 31 | $80k | $229k |
| 60532 | Lisle | DuPage County | 28,547 | 3,341 | $102k | $386k |
| 60534 | Lyons | Cook County | 10,327 | 5,517 | $71k | $257k |
| 60536 | Millbrook | Kendall County | 62 | 463 | $116k | $183k |
| 60537 | Millington | LaSalle County | 726 | 879 | $82k | $230k |
| 60538 | Montgomery | Kendall County | 30,514 | 3,151 | $97k | $267k |
| 60539 | Mooseheart | Kane County | 313 | 361 | – | – |
| 60540 | Naperville | DuPage County | 42,252 | 3,196 | $157k | $551k |
| 60541 | Newark | Kendall County | 3,342 | 40 | $118k | $314k |
| 60542 | North Aurora | Kane County | 18,932 | 1,999 | $115k | $342k |
| 60543 | Oswego | Kendall County | 43,047 | 1,026 | $119k | $344k |
| 60544 | Plainfield | Will County | 27,306 | 1,128 | $108k | $336k |
| 60545 | Plano | Kendall County | 14,392 | 393 | $87k | $242k |
| 60546 | Riverside | Cook County | 16,322 | 4,095 | $114k | $395k |
| 60548 | Sandwich | DeKalb County | 11,721 | 283 | $83k | $262k |
| 60549 | Serena | LaSalle County | 784 | 33 | $108k | $306k |
| 60550 | Shabbona | DeKalb County | 941 | 23 | $82k | $223k |
| 60551 | Sheridan | LaSalle County | 5,058 | 85 | $87k | $302k |
| 60552 | Somonauk | DeKalb County | 4,285 | 161 | $113k | $257k |
| 60553 | Steward | Lee County | 722 | 15 | $109k | $177k |
| 60554 | Sugar Grove | Kane County | 12,081 | 340 | $123k | $386k |
| 60555 | Warrenville | DuPage County | 15,223 | 1,895 | $102k | $288k |
| 60556 | Waterman | DeKalb County | 2,138 | 41 | $100k | $235k |
| 60557 | Wedron | LaSalle County | no residents | 0 | – | – |
| 60558 | Western Springs | Cook County | 13,446 | 4,728 | $230k | $739k |
| 60559 | Westmont | DuPage County | 24,231 | 5,161 | $91k | $365k |
| 60560 | Yorkville | Kendall County | 28,795 | 363 | $110k | $346k |
| 60561 | Darien | DuPage County | 23,069 | 3,473 | $113k | $404k |
| 60563 | Naperville | DuPage County | 39,330 | 2,700 | $110k | $436k |
| 60564 | Naperville | Will County | 47,016 | 2,935 | $181k | $572k |
| 60565 | Naperville | DuPage County | 40,483 | 3,143 | $164k | $520k |
| 60566 | Naperville | DuPage County | PO Box or unique | – | – | – |
| 60567 | Naperville | DuPage County | PO Box or unique | – | – | – |
| 60568 | Aurora | Kane County | PO Box or unique | – | – | – |
| 60569 | Aurora | DuPage County | PO Box or unique | – | – | – |
| 60572 | Aurora | DuPage County | PO Box or unique | – | – | – |
| 60585 | Plainfield | Will County | 25,960 | 1,744 | $156k | $453k |
| 60586 | Plainfield | Will County | 47,834 | 2,740 | $132k | $328k |
| 60598 | Aurora | DuPage County | PO Box or unique | – | – | – |
| 60599 | Fox Valley | DuPage County | PO Box or unique | – | – | – |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.