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County ZIP codes · Indiana · FIPS 18091

LaPorte County, IN ZIP Codes

LaPorte County, Indiana has 17 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 15 residential and 2 for PO boxes or a single organization. 12 of the residential ones lie mainly in LaPorte County and 3 mainly in a neighboring county; 7 cross the county line. Median household income ranges from $57,830 in 46346 (Kingsford Heights) to $95,208 in 46382 (Union Mills) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of LaPorte County?

46340 · Hanna: $59k46345 · Kingsbury: –46346 · Kingsford Heights: $58k46348 · La Crosse: $64k46350 · La Porte: $74k46360 · Michigan City: $59k46365 · Mill Creek: $98k46371 · Rolling Prairie: $100k46382 · Union Mills: $95k46390 · Wanatah: $88k46391 · Westville: $83k46532 · Hamlet: $85k46552 · New Carlisle: $91k46554 · North Liberty: $88k46574 · Walkerton: $76k4635046574463604655446532463484655246382463914639046371463404636546340 · Hanna: $59k46345 · Kingsbury: –46346 · Kingsford Heights: $58k46348 · La Crosse: $64k46350 · La Porte: $74k46360 · Michigan City: $59k46365 · Mill Creek: $98k46371 · Rolling Prairie: $100k46382 · Union Mills: $95k46390 · Wanatah: $88k46391 · Westville: $83k46532 · Hamlet: $85k46552 · New Carlisle: $91k46554 · North Liberty: $88k46574 · Walkerton: $76k4635046574463604655446532463484655246382463914639046371463404636546340 · Hanna: $59k46345 · Kingsbury: –46346 · Kingsford Heights: $58k46348 · La Crosse: $64k46350 · La Porte: $74k46360 · Michigan City: $59k46365 · Mill Creek: $98k46371 · Rolling Prairie: $100k46382 · Union Mills: $95k46390 · Wanatah: $88k46391 · Westville: $83k46532 · Hamlet: $85k46552 · New Carlisle: $91k46554 · North Liberty: $88k46574 · Walkerton: $76k46350465744636046554465324634846552463824639146390463714634046365
The residential ZIP codes of LaPorte County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

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 $59,266 and $84,866.

They carry 15 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 15 residential ZIP codes in LaPorte County

12 ZIP codes lie mainly in LaPorte County; 3 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in LaPorte County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
46350 La Porte 44,763 231 $74k $213k 100%
46360 Michigan City 43,817 572 $59k $167k 84%
46391 Westville 8,986 226 $83k $254k 67%
46574 Walkerton 7,426 76 $76k $188k 33%
46371 Rolling Prairie 3,396 90 $100k $256k 100%
46390 Wanatah 2,554 52 $88k $228k 99%
46382 Union Mills 1,835 37 $95k $214k 100%
46340 Hanna 1,524 46 $59k $172k 100%
46346 Kingsford Heights 1,358 1,585 $58k $121k 100%
46348 La Crosse 1,217 24 $64k $169k 99%
46365 Mill Creek 992 44 $98k $217k 100%
46345 Kingsbury 66 680 – $186k 100%

Partly in LaPorte County

Residential ZIP codes mainly in another county that reach at least 1% into LaPorte County, by their share here
In this county
46532 Hamlet 1,921 37 $85k $145k 41%
46552 New Carlisle 7,047 110 $91k $238k 24%
46554 North Liberty 4,405 65 $88k $203k 5%

Download the 17 ZIP codes as CSV

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?

8 ZIP codes of LaPorte County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in LaPorte County and in the neighboring counties
ZIPIn LaPorteElsewhere
4636084%Porter County 16%
4639167%Porter County 33%
4657433%St. Joseph County 30%; Marshall County 25%; Starke County 13%
4655224%St. Joseph County 76%
465545%St. Joseph County 95%
4639099%
4653241%Starke County 59%
4634899%Porter County 1%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

PO Box and single-organization ZIP codes

ZIP codes in LaPorte County without a residential area (GeoNames postal codes)
ZIPPostal name
46352La Porte
46361Michigan City

Source: GeoNames postal codes (CC BY 4.0).

Which first three digits do LaPorte County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. LaPorte County's ZIP codes use 2 prefixes: 463 and 465.

Three-digit prefixes of LaPorte County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are LaPorte County's
PrefixSectional centerHereAll codes
463 Gary, IN (SCF 463) 13 53
465 South Bend, IN (SCF 465) 4 52

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.