First three digits · Missouri
ZIP Codes Starting with
42 ZIP codes start with 637, sorted at the St Louis, MO (SCF 630) sectional center (USPS labeling list L005, effective October 1, 2026) in Missouri: 37 residential ZIP codes across 6 counties and 5 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 637 mean?
The first digit, 6, is one of ten national areas (Illinois, Kansas, Missouri and Nebraska). The first three, 637, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 637 to the St Louis, MO (SCF 630) facility. The last two digits pick the delivery area. By residents, the largest town names among the 637 ZIP codes are Cape Girardeau, Jackson, Perryville, Scott City, Chaffee and Marble Hill.
The same facility sorts 12 prefixes, 714 ZIP codes in all: 620, 622, 628, 629, 630, 631, 633, 634, 636, 637, 638, 639.
Where are the 637 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 637
| County | ||||||
|---|---|---|---|---|---|---|
| 63701 | Cape Girardeau | Cape Girardeau County | 39,345 | 297 | $67k | $220k |
| 63702 | Cape Girardeau | Cape Girardeau County | PO Box or unique | – | – | – |
| 63703 | Cape Girardeau | Cape Girardeau County | 8,201 | 635 | $39k | $122k |
| 63730 | Advance | Stoddard County | 3,397 | 30 | $71k | $130k |
| 63732 | Altenburg | Perry County | 863 | 26 | $76k | $174k |
| 63735 | Bell City | Stoddard County | 697 | 12 | $28k | $67k |
| 63736 | Benton | Scott County | 3,755 | 62 | $59k | $169k |
| 63737 | Brazeau | Perry County | PO Box or unique | – | – | – |
| 63738 | Brownwood | Stoddard County | no residents | 0 | – | – |
| 63739 | Burfordville | Cape Girardeau County | 508 | 35 | $63k | $142k |
| 63740 | Chaffee | Scott County | 5,165 | 59 | $54k | $141k |
| 63742 | Commerce | Scott County | 64 | 185 | – | – |
| 63743 | Daisy | Cape Girardeau County | 64 | 16 | $123k | – |
| 63744 | Delta | Cape Girardeau County | 198 | 104 | $36k | $110k |
| 63745 | Dutchtown | Cape Girardeau County | 136 | 417 | – | $106k |
| 63746 | Farrar | Perry County | 11 | 9 | – | – |
| 63747 | Friedheim | Cape Girardeau County | 972 | 49 | $106k | $191k |
| 63748 | Frohna | Perry County | 1,174 | 16 | $60k | $177k |
| 63750 | Gipsy | Bollinger County | 318 | 38 | $121k | $342k |
| 63751 | Glenallen | Bollinger County | 946 | 9 | $34k | $254k |
| 63752 | Gordonville | Cape Girardeau County | PO Box or unique | – | – | – |
| 63755 | Jackson | Cape Girardeau County | 27,629 | 156 | $79k | $252k |
| 63758 | Kelso | Scott County | 435 | 2,364 | $56k | $194k |
| 63760 | Leopold | Bollinger County | 604 | 17 | $80k | $218k |
| 63763 | McGee | Wayne County | 98 | 5 | – | – |
| 63764 | Marble Hill | Bollinger County | 4,760 | 28 | $50k | $139k |
| 63766 | Millersville | Cape Girardeau County | 1,715 | 35 | $59k | $210k |
| 63767 | Morley | Scott County | 526 | 584 | $47k | $86k |
| 63769 | Oak Ridge | Cape Girardeau County | 1,358 | 26 | $91k | $196k |
| 63770 | Old Appleton | Perry County | 203 | 75 | – | – |
| 63771 | Oran | Scott County | 2,365 | 22 | $71k | $133k |
| 63774 | Perkins | Scott County | 106 | 642 | $49k | – |
| 63775 | Perryville | Perry County | 16,325 | 48 | $64k | $188k |
| 63776 | McBride | Perry County | PO Box or unique | – | – | – |
| 63779 | Pocahontas | Cape Girardeau County | PO Box or unique | – | – | – |
| 63780 | Scott City | Scott County | 6,243 | 100 | $72k | $170k |
| 63781 | Sedgewickville | Bollinger County | 1,398 | 23 | $73k | $166k |
| 63782 | Sturdivant | Bollinger County | 172 | 11 | $78k | – |
| 63783 | Uniontown | Perry County | 60 | 11 | – | – |
| 63784 | Vanduser | Scott County | 253 | 154 | $48k | $69k |
| 63785 | Whitewater | Cape Girardeau County | 1,282 | 26 | $76k | $206k |
| 63787 | Zalma | Bollinger County | 551 | 9 | $46k | $130k |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.