First three digits · Kansas
ZIP Codes Starting with
37 ZIP codes start with 664, sorted at the Kansas City, MO (SCF 640) sectional center (USPS labeling list L005, effective October 1, 2026) in Kansas: 35 residential ZIP codes across 11 counties and 2 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 664 mean?
The first digit, 6, is one of ten national areas (Illinois, Kansas, Missouri and Nebraska). The first three, 664, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 664 to the Kansas City, MO (SCF 640) facility. The last two digits pick the delivery area. By residents, the largest town names among the 664 ZIP codes are Junction City, Fort Riley, Holton, Hiawatha, Berryton and Auburn.
The same facility sorts 15 prefixes, 642 ZIP codes in all: 640, 641, 644, 645, 646, 647, 649, 660, 661, 662, 664, 665, 666, 667, 668.
Where are the 664 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 664
| County | ||||||
|---|---|---|---|---|---|---|
| 66401 | Alma | Wabaunsee County | 1,948 | 8 | $74k | $221k |
| 66402 | Auburn | Shawnee County | 3,100 | 69 | $88k | $261k |
| 66403 | Axtell | Marshall County | 801 | 9 | $72k | $252k |
| 66404 | Baileyville | Nemaha County | 481 | 8 | $90k | $180k |
| 66406 | Beattie | Marshall County | 365 | 6 | $68k | – |
| 66407 | Belvue | Pottawatomie County | 298 | 5 | $68k | $227k |
| 66408 | Bern | Nemaha County | 427 | 8 | $91k | $153k |
| 66409 | Berryton | Shawnee County | 3,133 | 45 | $105k | $318k |
| 66411 | Blue Rapids | Marshall County | 1,127 | 10 | $57k | $86k |
| 66412 | Bremen | Marshall County | 644 | 13 | $87k | $179k |
| 66413 | Burlingame | Osage County | 1,721 | 17 | $65k | $124k |
| 66414 | Carbondale | Osage County | 2,360 | 38 | $74k | $162k |
| 66415 | Centralia | Nemaha County | 762 | 8 | $70k | $86k |
| 66416 | Circleville | Jackson County | 522 | 15 | $74k | $157k |
| 66417 | Corning | Nemaha County | 507 | 12 | $87k | – |
| 66418 | Delia | Jackson County | 556 | 8 | $78k | $168k |
| 66419 | Denison | Jackson County | 600 | 30 | $100k | $116k |
| 66420 | Dover | Shawnee County | PO Box or unique | – | – | – |
| 66422 | Emmett | Pottawatomie County | 1,228 | 22 | $73k | – |
| 66423 | Eskridge | Wabaunsee County | 884 | 6 | $61k | $96k |
| 66424 | Everest | Brown County | 486 | 9 | $59k | $131k |
| 66425 | Fairview | Brown County | 391 | 9 | $61k | $108k |
| 66426 | Fostoria | Pottawatomie County | PO Box or unique | – | – | – |
| 66427 | Frankfort | Marshall County | 1,334 | 6 | $80k | $134k |
| 66428 | Goff | Nemaha County | 246 | 3 | $101k | $107k |
| 66429 | Grantville | Jefferson County | 379 | 30 | $69k | $175k |
| 66431 | Harveyville | Wabaunsee County | 718 | 12 | $93k | $167k |
| 66432 | Havensville | Pottawatomie County | 540 | 8 | $109k | $263k |
| 66434 | Hiawatha | Brown County | 4,740 | 22 | $77k | $143k |
| 66436 | Holton | Jackson County | 5,537 | 30 | $71k | $213k |
| 66438 | Home | Marshall County | 200 | 6 | $76k | $358k |
| 66439 | Horton | Brown County | 2,578 | 30 | $53k | $91k |
| 66440 | Hoyt | Jackson County | 1,943 | 41 | $97k | $235k |
| 66441 | Junction City | Geary County | 25,828 | 111 | $60k | $170k |
| 66442 | Fort Riley | Riley County | 16,890 | 497 | $52k | – |
| 66449 | Leonardville | Riley County | 937 | 14 | $90k | $210k |
| 66451 | Lyndon | Osage County | 1,671 | 21 | $77k | $159k |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.