First three digits · Illinois
ZIP Codes Starting with
83 ZIP codes start with 604, sorted at the South Suburban, IL (SCF 604) sectional center (USPS labeling list L005, effective October 1, 2026) in Illinois: 79 residential ZIP codes across 6 counties and 4 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 604 mean?
The first digit, 6, is one of ten national areas (Illinois, Kansas, Missouri and Nebraska). The first three, 604, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 604 to the South Suburban, IL (SCF 604) facility. The last two digits pick the delivery area. By residents, the largest town names among the 604 ZIP codes are Joliet, Bolingbrook, Orland Park, Berwyn, Tinley Park and Oak Lawn.
604 is the only prefix the South Suburban, IL (SCF 604) facility sorts.
Where are the 604 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 604
| County | ||||||
|---|---|---|---|---|---|---|
| 60401 | Beecher | Will County | 7,647 | 135 | $98k | $261k |
| 60402 | Berwyn | Cook County | 63,721 | 11,109 | $78k | $295k |
| 60403 | Crest Hill | Will County | 18,371 | 3,757 | $73k | $233k |
| 60404 | Shorewood | Will County | 20,385 | 1,296 | $122k | $336k |
| 60406 | Blue Island | Cook County | 23,327 | 4,343 | $57k | $175k |
| 60407 | Braceville | Grundy County | 1,812 | 134 | $90k | $191k |
| 60408 | Braidwood | Will County | 5,327 | 834 | $95k | $216k |
| 60409 | Calumet City | Cook County | 35,100 | 4,531 | $55k | $145k |
| 60410 | Channahon | Will County | 14,239 | 591 | $119k | $321k |
| 60411 | Chicago Heights | Cook County | 52,175 | 1,700 | $62k | $160k |
| 60412 | Chicago Heights | Cook County | PO Box or unique | – | – | – |
| 60415 | Chicago Ridge | Cook County | 14,099 | 6,222 | $69k | $227k |
| 60416 | Coal City | Grundy County | 9,550 | 419 | $75k | $222k |
| 60417 | Crete | Will County | 14,901 | 402 | $92k | $243k |
| 60418 | Crestwood | Cook County | 10,572 | 3,572 | $76k | $195k |
| 60419 | Dolton | Cook County | 20,825 | 4,905 | $58k | $151k |
| 60420 | Dwight | Livingston County | 4,682 | 48 | $71k | $167k |
| 60421 | Elwood | Will County | 3,649 | 61 | $103k | $272k |
| 60422 | Flossmoor | Cook County | 9,542 | 2,396 | $135k | $344k |
| 60423 | Frankfort | Will County | 32,836 | 867 | $137k | $398k |
| 60424 | Gardner | Grundy County | 2,153 | 41 | $83k | $197k |
| 60425 | Glenwood | Cook County | 8,714 | 1,548 | $77k | $197k |
| 60426 | Harvey | Cook County | 23,906 | 3,090 | $42k | $91k |
| 60428 | Markham | Cook County | 10,927 | 2,154 | $60k | $136k |
| 60429 | Hazel Crest | Cook County | 14,864 | 3,649 | $67k | $184k |
| 60430 | Homewood | Cook County | 19,838 | 2,883 | $97k | $221k |
| 60431 | Joliet | Will County | 27,138 | 2,113 | $123k | $294k |
| 60432 | Joliet | Will County | 20,465 | 2,403 | $65k | $194k |
| 60433 | Joliet | Will County | 16,382 | 1,208 | $67k | $172k |
| 60434 | Joliet | Will County | PO Box or unique | – | – | – |
| 60435 | Joliet | Will County | 48,167 | 4,448 | $76k | $236k |
| 60436 | Joliet | Will County | 19,423 | 1,079 | $63k | $181k |
| 60437 | Kinsman | Grundy County | 117 | 6 | $59k | $129k |
| 60438 | Lansing | Cook County | 28,806 | 3,573 | $76k | $178k |
| 60439 | Lemont | Cook County | 24,192 | 814 | $122k | $481k |
| 60440 | Bolingbrook | Will County | 51,940 | 3,444 | $94k | $277k |
| 60441 | Lockport | Will County | 36,844 | 1,309 | $103k | $297k |
| 60442 | Manhattan | Will County | 13,753 | 205 | $128k | $356k |
| 60443 | Matteson | Cook County | 20,663 | 1,835 | $92k | $234k |
| 60444 | Mazon | Grundy County | 1,901 | 38 | $88k | $219k |
| 60445 | Midlothian | Cook County | 14,268 | 3,324 | $71k | $208k |
| 60446 | Romeoville | Will County | 41,672 | 2,136 | $106k | $256k |
| 60447 | Minooka | Kendall County | 16,102 | 238 | $108k | $323k |
| 60448 | Mokena | Will County | 24,405 | 1,333 | $121k | $386k |
| 60449 | Monee | Will County | 9,477 | 192 | $105k | $300k |
| 60450 | Morris | Grundy County | 20,783 | 132 | $82k | $276k |
| 60451 | New Lenox | Will County | 37,361 | 1,485 | $137k | $393k |
| 60452 | Oak Forest | Cook County | 26,739 | 3,114 | $93k | $256k |
| 60453 | Oak Lawn | Cook County | 56,861 | 6,694 | $84k | $281k |
| 60454 | Oak Lawn | Cook County | PO Box or unique | – | – | – |
| 60455 | Bridgeview | Cook County | 16,872 | 3,979 | $67k | $237k |
| 60456 | Hometown | Cook County | 4,215 | 8,800 | $61k | $173k |
| 60457 | Hickory Hills | Cook County | 14,503 | 4,628 | $77k | $288k |
| 60458 | Justice | Cook County | 14,200 | 4,868 | $61k | $225k |
| 60459 | Burbank | Cook County | 28,739 | 6,872 | $80k | $276k |
| 60460 | Odell | Livingston County | 1,399 | 14 | $91k | $156k |
| 60461 | Olympia Fields | Cook County | 4,761 | 1,414 | $124k | $328k |
| 60462 | Orland Park | Cook County | 41,456 | 2,594 | $97k | $349k |
| 60463 | Palos Heights | Cook County | 13,722 | 2,606 | $108k | $363k |
| 60464 | Palos Park | Cook County | 9,773 | 742 | $126k | $460k |
| 60465 | Palos Hills | Cook County | 18,081 | 4,200 | $84k | $279k |
| 60466 | Park Forest | Cook County | 21,461 | 3,398 | $62k | $115k |
| 60467 | Orland Park | Cook County | 24,398 | 1,652 | $115k | $412k |
| 60468 | Peotone | Will County | 5,809 | 83 | $105k | $294k |
| 60469 | Posen | Cook County | 5,205 | 4,590 | $74k | $174k |
| 60470 | Ransom | LaSalle County | 358 | 8 | $85k | $131k |
| 60471 | Richton Park | Cook County | 12,848 | 3,237 | $65k | $222k |
| 60472 | Robbins | Cook County | 4,563 | 2,700 | $41k | $121k |
| 60473 | South Holland | Cook County | 21,225 | 2,706 | $86k | $217k |
| 60474 | South Wilmington | Grundy County | 663 | 123 | $86k | $178k |
| 60475 | Steger | Cook County | 10,035 | 2,083 | $68k | $159k |
| 60476 | Thornton | Cook County | 1,940 | 586 | $60k | $155k |
| 60477 | Tinley Park | Cook County | 35,976 | 2,530 | $95k | $275k |
| 60478 | Country Club Hills | Cook County | 16,390 | 1,675 | $75k | $192k |
| 60479 | Verona | Grundy County | 671 | 17 | $105k | $224k |
| 60480 | Willow Springs | Cook County | 5,388 | 479 | $99k | $364k |
| 60481 | Wilmington | Will County | 11,195 | 91 | $79k | $233k |
| 60482 | Worth | Cook County | 10,897 | 4,669 | $56k | $209k |
| 60484 | University Park | Will County | 6,762 | 898 | $73k | $155k |
| 60487 | Tinley Park | Cook County | 26,043 | 3,484 | $132k | $351k |
| 60490 | Bolingbrook | Will County | 22,156 | 2,291 | $151k | $395k |
| 60491 | Homer Glen | Will County | 22,757 | 889 | $139k | $425k |
| 60499 | Bedford Park | Cook 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.