County ZIP codes · Nebraska · FIPS 31025
Cass County, NE ZIP Codes
Cass County, Nebraska has 20 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 15 of the residential ones lie mainly in Cass County and 5 mainly in a neighboring county; 10 cross the county line. Median household income ranges from $76,369 in 68349 (Elmwood) to $119,712 in 68462 (Waverly) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Cass 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 $85,972 and $95,709.
They carry 20 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 20 residential ZIP codes in Cass County
15 ZIP codes lie mainly in Cass County; 5 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 68048 | Plattsmouth | 13,435 | 143 | $90k | $262k | 100% |
| 68037 | Louisville | 2,524 | 47 | $108k | $246k | 100% |
| 68347 | Eagle | 2,508 | 80 | $88k | $238k | 66% |
| 68463 | Weeping Water | 1,831 | 32 | $86k | $200k | 100% |
| 68349 | Elmwood | 1,224 | 25 | $76k | $218k | 100% |
| 68366 | Greenwood | 957 | 18 | $91k | $247k | 62% |
| 68407 | Murdock | 878 | 19 | $100k | $307k | 100% |
| 68455 | Union | 852 | 22 | $115k | $321k | 93% |
| 68409 | Murray | 625 | 21 | $92k | $221k | 100% |
| 68413 | Nehawka | 558 | 10 | $82k | $304k | 85% |
| 68016 | Cedar Creek | 427 | 100 | $119k | $391k | 100% |
| 68304 | Alvo | 414 | 17 | $79k | $300k | 100% |
| 68058 | South Bend | 378 | 652 | $138k | $542k | 100% |
| 68307 | Avoca | 336 | 8 | $61k | $174k | 54% |
| 68403 | Manley | 206 | 278 | $65k | $163k | 100% |
Partly in Cass County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 68003 | Ashland | 5,139 | 47 | $96k | $307k | 27% |
| 68527 | Lincoln | 2,318 | 78 | $145k | $510k | 6% |
| 68462 | Waverly | 4,928 | 89 | $120k | $323k | 5% |
| 68418 | Palmyra | 1,109 | 16 | $86k | $203k | 3% |
| 68454 | Unadilla | 778 | 14 | $84k | $225k | 2% |
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?
10 ZIP codes of Cass County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Cass | Elsewhere |
|---|---|---|
| 68003 | 27% | Saunders County73% |
| 68462 | 5% | Lancaster County95% |
| 68347 | 66% | Otoe County34% |
| 68527 | 6% | Lancaster County94% |
| 68418 | 3% | Otoe County97% |
| 68366 | 62% | Lancaster County33%; Saunders County5% |
| 68455 | 93% | Otoe County7% |
| 68454 | 2% | Otoe County98% |
| 68413 | 85% | Otoe County15% |
| 68307 | 54% | Otoe County46% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
Which first three digits do Cass County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Cass County's ZIP codes use 4 prefixes: 680, 683, 684 and 685.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 680 | Omaha, NE (SCF 680) | 5 | 57 |
| 683 | Lincoln, NE (SCF 683) | 5 | 70 |
| 684 | Lincoln, NE (SCF 683) | 9 | 56 |
| 685 | Lincoln, NE (SCF 683) | 1 | 29 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.