First three digits · Missouri
ZIP Codes Starting with
42 ZIP codes start with 634, sorted at the St Louis, MO (SCF 630) sectional center (USPS labeling list L005, effective October 1, 2026) in Missouri: 40 residential ZIP codes across 10 counties and 2 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 634 mean?
The first digit, 6, is one of ten national areas (Illinois, Kansas, Missouri and Nebraska). The first three, 634, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 634 to the St Louis, MO (SCF 630) facility. The last two digits pick the delivery area. By residents, the largest town names among the 634 ZIP codes are Hannibal, Palmyra, Monroe City, New London, Canton and Kahoka.
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 634 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 634
| County | ||||||
|---|---|---|---|---|---|---|
| 63401 | Hannibal | Marion County | 21,489 | 194 | $60k | $152k |
| 63430 | Alexandria | Clark County | 457 | 9 | $65k | – |
| 63431 | Anabel | Macon County | 547 | 11 | $66k | – |
| 63432 | Arbela | Scotland County | 363 | 4 | $61k | $134k |
| 63433 | Ashburn | Pike County | no residents | 0 | – | – |
| 63434 | Bethel | Shelby County | 731 | 11 | $51k | $89k |
| 63435 | Canton | Lewis County | 4,318 | 30 | $62k | $152k |
| 63436 | Center | Ralls County | 1,199 | 15 | $57k | $176k |
| 63437 | Clarence | Shelby County | 1,560 | 12 | $37k | $87k |
| 63438 | Durham | Lewis County | 232 | 18 | $42k | $188k |
| 63439 | Emden | Shelby County | 183 | 8 | $34k | $87k |
| 63440 | Ewing | Lewis County | 1,136 | 13 | $60k | $148k |
| 63441 | Frankford | Pike County | 1,144 | 12 | $77k | $105k |
| 63442 | Granger | Scotland County | PO Box or unique | – | – | – |
| 63443 | Hunnewell | Monroe County | 393 | 8 | $42k | $96k |
| 63445 | Kahoka | Clark County | 3,831 | 25 | $48k | $109k |
| 63446 | Knox City | Knox County | 493 | 5 | $61k | – |
| 63447 | La Belle | Lewis County | 1,060 | 12 | $44k | $94k |
| 63448 | La Grange | Lewis County | 1,760 | 36 | $61k | $118k |
| 63450 | Lentner | Shelby County | 145 | 6 | $70k | $88k |
| 63451 | Leonard | Shelby County | 177 | 3 | $81k | – |
| 63452 | Lewistown | Lewis County | 1,026 | 10 | $62k | $87k |
| 63453 | Luray | Clark County | 388 | 7 | $74k | $225k |
| 63454 | Maywood | Marion County | 1,104 | 26 | $88k | $167k |
| 63456 | Monroe City | Marion County | 4,749 | 26 | $64k | $161k |
| 63457 | Monticello | Lewis County | 389 | 11 | $58k | $181k |
| 63458 | Newark | Knox County | 185 | 7 | $69k | $90k |
| 63459 | New London | Ralls County | 4,423 | 32 | $68k | $171k |
| 63460 | Novelty | Knox County | 151 | 2 | – | $108k |
| 63461 | Palmyra | Marion County | 5,446 | 35 | $70k | $212k |
| 63462 | Perry | Ralls County | 1,335 | 11 | $51k | $157k |
| 63463 | Philadelphia | Marion County | 711 | 15 | $70k | $146k |
| 63464 | Plevna | Knox County | PO Box or unique | – | – | – |
| 63465 | Revere | Clark County | 633 | 11 | $57k | $262k |
| 63466 | Saint Patrick | Clark County | no residents | 0 | – | – |
| 63467 | Saverton | Ralls County | 19 | 62 | – | – |
| 63468 | Shelbina | Shelby County | 2,314 | 16 | $46k | $101k |
| 63469 | Shelbyville | Shelby County | 911 | 7 | $56k | $120k |
| 63471 | Taylor | Marion County | 770 | 17 | $103k | $271k |
| 63472 | Wayland | Clark County | 439 | 526 | $23k | – |
| 63473 | Williamstown | Lewis County | 375 | 6 | $57k | $166k |
| 63474 | Wyaconda | Clark County | 444 | 6 | $51k | $68k |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.