County ZIP codes · Indiana · FIPS 18099
Marshall County, IN ZIP Codes
Marshall County, Indiana has 15 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 9 of the residential ones lie mainly in Marshall County and 6 mainly in a neighboring county; 12 cross the county line. Median household income ranges from $58,293 in 46511 (Culver) to $84,084 in 46550 (Nappanee) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Marshall 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 $65,987 and $78,448.
They carry 15 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 15 residential ZIP codes in Marshall County
9 ZIP codes lie mainly in Marshall County; 6 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 46563 | Plymouth | 23,615 | 154 | $73k | $201k | 99% |
| 46506 | Bremen | 9,994 | 99 | $79k | $243k | 62% |
| 46501 | Argos | 3,780 | 53 | $64k | $157k | 97% |
| 46511 | Culver | 3,755 | 56 | $58k | $234k | 65% |
| 46504 | Bourbon | 3,500 | 53 | $75k | $184k | 96% |
| 46570 | Tippecanoe | 1,279 | 64 | $54k | $221k | 98% |
| 46537 | Lapaz | 475 | 1,147 | $64k | $150k | 100% |
| 46572 | Tyner | 115 | 289 | $125k | $157k | 100% |
| 46513 | Donaldson | no residents | 0 | – | – | 100% |
Partly in Marshall County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 46574 | Walkerton | 7,426 | 76 | $76k | $188k | 25% |
| 46536 | Lakeville | 2,964 | 101 | $78k | $227k | 9% |
| 46550 | Nappanee | 12,843 | 179 | $84k | $282k | 6% |
| 46539 | Mentone | 2,659 | 76 | $74k | $159k | 6% |
| 46524 | Etna Green | 2,023 | 58 | $66k | $178k | 1% |
| 46531 | Grovertown | 1,825 | 86 | $58k | $142k | 1% |
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?
12 ZIP codes of Marshall County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Marshall | Elsewhere |
|---|---|---|
| 46563 | 99% | Starke County 1% |
| 46550 | 6% | Elkhart County 54%; Kosciusko County 35%; St. Joseph County 5% |
| 46506 | 62% | St. Joseph County 38% |
| 46574 | 25% | LaPorte County 33%; St. Joseph County 30%; Starke County 13% |
| 46501 | 97% | Fulton County 3% |
| 46511 | 65% | Starke County 23%; Fulton County 12% |
| 46504 | 96% | Kosciusko County 4% |
| 46536 | 9% | St. Joseph County 91% |
| 46539 | 6% | Kosciusko County 86%; Fulton County 8% |
| 46524 | 1% | Kosciusko County 99% |
| 46531 | 1% | Starke County 99% |
| 46570 | 98% | Fulton County 2% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
Which first three digits do Marshall 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 Marshall County starts with 465.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 465 | South Bend, IN (SCF 465) | 15 | 52 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.