First three digits · Utah
ZIP Codes Starting with
40 ZIP codes start with 843, sorted at the Salt Lake City, UT (SCF 840) sectional center (USPS labeling list L005, effective October 1, 2026) in Utah: 39 residential ZIP codes across 3 counties and 1 PO Box or single-organization code (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 843 mean?
The first digit, 8, is one of ten national areas (Arizona, Colorado, Idaho, New Mexico, Nevada, Utah and Wyoming). The first three, 843, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 843 to the Salt Lake City, UT (SCF 840) facility. The last two digits pick the delivery area. By residents, the largest town names among the 843 ZIP codes are Logan, Brigham City, Smithfield, Tremonton, Hyrum and Hooper.
The same facility sorts 9 prefixes, 266 ZIP codes in all: 829, 830, 831, 840, 841, 842, 843, 844, 898.
Where are the 843 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 843
| County | ||||||
|---|---|---|---|---|---|---|
| 84301 | Bear River City | Box Elder County | 889 | 315 | $90k | $433k |
| 84302 | Brigham City | Box Elder County | 27,053 | 340 | $80k | $392k |
| 84304 | Cache Junction | Cache County | 6 | 1 | – | – |
| 84305 | Clarkston | Cache County | 667 | 12 | $65k | $339k |
| 84306 | Collinston | Box Elder County | 521 | 23 | $121k | $450k |
| 84307 | Corinne | Box Elder County | 1,356 | 2 | $80k | $402k |
| 84308 | Cornish | Cache County | 260 | 19 | $83k | $309k |
| 84309 | Deweyville | Box Elder County | 871 | 101 | $100k | $484k |
| 84310 | Eden | Weber County | 4,577 | 43 | $130k | $881k |
| 84311 | Fielding | Box Elder County | 1,013 | 114 | $78k | $454k |
| 84312 | Garland | Box Elder County | 4,857 | 195 | $83k | $398k |
| 84313 | Grouse Creek | Box Elder County | no residents | 0 | – | – |
| 84314 | Honeyville | Box Elder County | 964 | 124 | $88k | $451k |
| 84315 | Hooper | Weber County | 9,873 | 548 | $110k | $614k |
| 84316 | Howell | Box Elder County | 288 | 8 | $88k | $263k |
| 84317 | Huntsville | Weber County | 2,962 | 14 | $130k | $763k |
| 84318 | Hyde Park | Cache County | 5,604 | 1,004 | $113k | $567k |
| 84319 | Hyrum | Cache County | 10,931 | 108 | $89k | $425k |
| 84320 | Lewiston | Cache County | 3,162 | 67 | $104k | $380k |
| 84321 | Logan | Cache County | 51,702 | 235 | $69k | $401k |
| 84322 | Logan | Cache County | no residents | 0 | – | – |
| 84323 | Logan | Cache County | PO Box or unique | – | – | – |
| 84324 | Mantua | Box Elder County | 1,677 | 76 | $142k | $607k |
| 84325 | Mendon | Cache County | 2,525 | 59 | $116k | $609k |
| 84326 | Millville | Cache County | 1,949 | 544 | $92k | $495k |
| 84327 | Newton | Cache County | 921 | 55 | $77k | $388k |
| 84328 | Paradise | Cache County | 1,681 | 35 | $114k | $587k |
| 84329 | Park Valley | Box Elder County | 424 | 1 | – | $284k |
| 84330 | Plymouth | Box Elder County | 364 | 10 | $87k | $403k |
| 84331 | Portage | Box Elder County | 245 | 2 | $66k | $352k |
| 84332 | Providence | Cache County | 8,954 | 2,240 | $118k | $516k |
| 84333 | Richmond | Cache County | 3,093 | 134 | $109k | $399k |
| 84334 | Riverside | Box Elder County | 180 | 400 | – | – |
| 84335 | Smithfield | Cache County | 16,210 | 248 | $98k | $448k |
| 84336 | Snowville | Box Elder County | 481 | 1 | $89k | – |
| 84337 | Tremonton | Box Elder County | 16,199 | 97 | $82k | $393k |
| 84338 | Trenton | Cache County | 526 | 55 | $95k | $358k |
| 84339 | Wellsville | Cache County | 6,295 | 101 | $113k | $480k |
| 84340 | Willard | Box Elder County | 3,744 | 116 | $108k | $498k |
| 84341 | Logan | Cache County | 25,560 | 2,393 | $69k | $466k |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.