County ZIP codes · North Carolina · FIPS 37027
Caldwell County, NC ZIP Codes
Caldwell County, North Carolina has 10 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 8 residential and 2 for PO boxes or a single organization. 5 of the residential ones lie mainly in Caldwell County and 3 mainly in a neighboring county; 7 cross the county line. Median household income ranges from $51,650 in 28645 (Lenoir) to $76,477 in 28605 (Blowing Rock) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Caldwell County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $56,600 and $67,135.
They carry 8 postal town names: Hickory, Lenoir, Granite Falls, Hudson, Blowing Rock, Boomer, Collettsville, Rhodhiss.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 8 residential ZIP codes in Caldwell County
5 ZIP codes lie mainly in Caldwell County; 3 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 28645 | Lenoir | 45,997 | 140 | $52k | $176k | 96% |
| 28630 | Granite Falls | 19,382 | 318 | $64k | $202k | 99% |
| 28638 | Hudson | 12,363 | 619 | $67k | $208k | 100% |
| 28611 | Collettsville | 424 | 6 | – | – | 81% |
| 28667 | Rhodhiss | 301 | 642 | $26k | $122k | 87% |
Partly in Caldwell County
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
7 ZIP codes of Caldwell County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Caldwell | Elsewhere |
|---|---|---|
| 28601 | 8% | Catawba County64%; Burke County16%; Alexander County13% |
| 28645 | 96% | Watauga County2% |
| 28630 | 99% | Alexander County1% |
| 28605 | 23% | Watauga County71%; Avery County6% |
| 28606 | 11% | Wilkes County89% |
| 28611 | 81% | Avery County19% |
| 28667 | 87% | Burke County13% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 28633 | Lenoir |
| 28661 | Patterson |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Caldwell County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Caldwell County starts with 286.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 286 | Charlotte, NC (SCF 282) | 10 | 90 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.