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County ZIP codes · Michigan · FIPS 26027

Cass County, MI ZIP Codes

Cass County, Michigan has 14 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 7 of the residential ones lie mainly in Cass County and 7 mainly in a neighboring county; 9 cross the county line. Median household income ranges from $57,436 in 49045 (Decatur) to $83,393 in 49095 (Vandalia) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Cass County?

49031 · Cassopolis: $67k49042 · Constantine: $73k49045 · Decatur: $57k49047 · Dowagiac: $63k49061 · Jones: $79k49067 · Marcellus: $75k49093 · Three Rivers: $63k49095 · Vandalia: $83k49099 · White Pigeon: $70k49102 · Berrien Center: $63k49111 · Eau Claire: $71k49112 · Edwardsburg: $62k49120 · Niles: $65k49130 · Union: $77k490314904749093490454912049067490424906149112490994911149095491024913049031 · Cassopolis: $67k49042 · Constantine: $73k49045 · Decatur: $57k49047 · Dowagiac: $63k49061 · Jones: $79k49067 · Marcellus: $75k49093 · Three Rivers: $63k49095 · Vandalia: $83k49099 · White Pigeon: $70k49102 · Berrien Center: $63k49111 · Eau Claire: $71k49112 · Edwardsburg: $62k49120 · Niles: $65k49130 · Union: $77k490314904749093490454912049067490424906149112490994911149095491024913049031 · Cassopolis: $67k49042 · Constantine: $73k49045 · Decatur: $57k49047 · Dowagiac: $63k49061 · Jones: $79k49067 · Marcellus: $75k49093 · Three Rivers: $63k49095 · Vandalia: $83k49099 · White Pigeon: $70k49102 · Berrien Center: $63k49111 · Eau Claire: $71k49112 · Edwardsburg: $62k49120 · Niles: $65k49130 · Union: $77k4903149047490934904549120490674904249061491124909949111
The residential ZIP codes of Cass 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 $62,963 and $72,910.

They carry 14 postal town names.

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

All 14 residential ZIP codes in Cass County

7 ZIP codes lie mainly in Cass County; 7 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Cass County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
49047 Dowagiac 14,858 125 $63k $182k 91%
49112 Edwardsburg 10,544 241 $62k $249k 100%
49031 Cassopolis 7,869 70 $67k $233k 100%
49067 Marcellus 3,974 48 $75k $211k 64%
49095 Vandalia 2,432 85 $83k $264k 100%
49061 Jones 1,799 47 $79k $224k 100%
49130 Union 1,258 107 $77k $342k 100%

Partly in Cass County

Residential ZIP codes mainly in another county that reach at least 1% into Cass County, by their share here
In this county
49120 Niles 36,495 313 $65k $178k 47%
49045 Decatur 5,321 62 $57k $177k 20%
49099 White Pigeon 5,942 102 $70k $177k 18%
49042 Constantine 4,564 80 $73k $161k 8%
49093 Three Rivers 18,433 174 $63k $183k 5%
49102 Berrien Center 1,472 98 $63k $262k 4%
49111 Eau Claire 3,159 73 $71k $176k 2%

Download the 14 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?

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

Share of each ZIP code's land in Cass County and in the neighboring counties
ZIPIn CassElsewhere
4912047%Berrien County53%
490935%St. Joseph County95%
4904791%Van Buren County8%; Berrien County2%
4909918%St. Joseph County82%
4904520%Van Buren County80%
490428%St. Joseph County92%
4906764%St. Joseph County29%; Van Buren County7%
491112%Berrien County98%
491024%Berrien County96%

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 2 prefixes: 490 and 491.

Three-digit prefixes of Cass 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 Cass County's
PrefixSectional centerHereAll codes
490Grand Rapids, MI (SCF 493)992
491Grand Rapids, MI (SCF 493)520

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