First three digits · Kansas
ZIP Codes Starting with
36 ZIP codes start with 668, 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 8 counties and 1 PO Box or single-organization code (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 668 mean?
The first digit, 6, is one of ten national areas (Illinois, Kansas, Missouri and Nebraska). The first three, 668, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 668 to the Kansas City, MO (SCF 640) facility. The last two digits pick the delivery area. By residents, the largest town names among the 668 ZIP codes are Emporia, Burlington, Council Grove, Marion, Peabody and Lebo.
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 668 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 668
| County | ||||||
|---|---|---|---|---|---|---|
| 66801 | Emporia | Lyon County | 27,585 | 92 | $57k | $153k |
| 66830 | Admire | Lyon County | 203 | 7 | $57k | $103k |
| 66833 | Allen | Lyon County | 641 | 5 | $58k | $127k |
| 66834 | Alta Vista | Wabaunsee County | 856 | 5 | $60k | $124k |
| 66835 | Americus | Lyon County | 1,202 | 21 | $81k | $124k |
| 66838 | Burdick | Morris County | 99 | 2 | $44k | $107k |
| 66839 | Burlington | Coffey County | 3,654 | 25 | $63k | $176k |
| 66840 | Burns | Butler County | 474 | 3 | $56k | $86k |
| 66842 | Cassoday | Butler County | 508 | 4 | $73k | $137k |
| 66843 | Cedar Point | Chase County | 105 | 1 | $37k | $113k |
| 66845 | Cottonwood Falls | Chase County | 1,237 | 8 | $52k | $90k |
| 66846 | Council Grove | Morris County | 3,333 | 11 | $62k | $154k |
| 66849 | Dwight | Morris County | 531 | 8 | $62k | $110k |
| 66850 | Elmdale | Chase County | 202 | 2 | $94k | $110k |
| 66851 | Florence | Marion County | 659 | 10 | $48k | $63k |
| 66852 | Gridley | Coffey County | 587 | 4 | $61k | $111k |
| 66853 | Hamilton | Greenwood County | 281 | 2 | $52k | $49k |
| 66854 | Hartford | Lyon County | 1,007 | 10 | $96k | $78k |
| 66855 | Lamont | Greenwood County | PO Box or unique | – | – | – |
| 66856 | Lebo | Coffey County | 1,583 | 11 | $76k | $170k |
| 66857 | Le Roy | Coffey County | 872 | 11 | $62k | $136k |
| 66858 | Lincolnville | Marion County | 428 | 6 | $77k | $93k |
| 66859 | Lost Springs | Marion County | 158 | 4 | $80k | – |
| 66860 | Madison | Greenwood County | 1,342 | 7 | $61k | $76k |
| 66861 | Marion | Marion County | 2,769 | 14 | $61k | $150k |
| 66862 | Matfield Green | Chase County | 68 | 1 | – | $169k |
| 66863 | Neal | Greenwood County | 27 | 61 | – | – |
| 66864 | Neosho Rapids | Lyon County | 375 | 10 | $37k | $58k |
| 66865 | Olpe | Lyon County | 1,105 | 7 | $93k | $182k |
| 66866 | Peabody | Marion County | 1,737 | 13 | $59k | $97k |
| 66868 | Reading | Lyon County | 620 | 5 | $103k | $150k |
| 66869 | Strong City | Chase County | 669 | 6 | $51k | $110k |
| 66870 | Virgil | Greenwood County | 121 | 1 | $34k | – |
| 66871 | Waverly | Coffey County | 1,347 | 10 | $71k | $145k |
| 66872 | White City | Morris County | 807 | 6 | $59k | $77k |
| 66873 | Wilsey | Morris County | 201 | 3 | $75k | $76k |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.