Plain

County ZIP codes · Wisconsin · FIPS 55047

Green Lake County, WI ZIP Codes

Green Lake County, Wisconsin has 12 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 6 of the residential ones lie mainly in Green Lake County and 6 mainly in a neighboring county; 9 cross the county line. Median household income ranges from $64,611 in 53949 (Montello) to $84,231 in 53956 (Randolph) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Green Lake County?

53923 · Cambria: $73k53926 · Dalton: $63k53939 · Kingston: $71k53946 · Markesan: $73k53947 · Marquette: $56k53949 · Montello: $65k53956 · Randolph: $84k54923 · Berlin: $66k54941 · Green Lake: $79k54960 · Neshkoro: $67k54968 · Princeton: $66k54971 · Ripon: $67k5394953946549235497154960539565392354968539265494153923 · Cambria: $73k53926 · Dalton: $63k53939 · Kingston: $71k53946 · Markesan: $73k53947 · Marquette: $56k53949 · Montello: $65k53956 · Randolph: $84k54923 · Berlin: $66k54941 · Green Lake: $79k54960 · Neshkoro: $67k54968 · Princeton: $66k54971 · Ripon: $67k5394953946549235497154960539565392354968539265494153923 · Cambria: $73k53926 · Dalton: $63k53939 · Kingston: $71k53946 · Markesan: $73k53947 · Marquette: $56k53949 · Montello: $65k53956 · Randolph: $84k54923 · Berlin: $66k54941 · Green Lake: $79k54960 · Neshkoro: $67k54968 · Princeton: $66k54971 · Ripon: $67k53949539465492354971549605395653923549685392654941
The residential ZIP codes of Green Lake 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 $66,223 and $72,500.

They carry 12 postal town names.

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

All 12 residential ZIP codes in Green Lake County

6 ZIP codes lie mainly in Green Lake County; 6 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Green Lake County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
53946 Markesan 4,333 34 $73k $246k 93%
54968 Princeton 2,762 45 $66k $197k 81%
54941 Green Lake 2,563 79 $79k $276k 100%
53926 Dalton 1,951 38 $63k $227k 55%
53939 Kingston 251 246 $71k $148k 100%
53947 Marquette 223 639 $56k $240k 100%

Partly in Green Lake County

Residential ZIP codes mainly in another county that reach at least 1% into Green Lake County, by their share here
In this county
54923 Berlin 8,793 65 $66k $189k 43%
54971 Ripon 10,907 98 $67k $193k 21%
54960 Neshkoro 2,997 29 $67k $234k 19%
53923 Cambria 2,295 30 $73k $221k 10%
53956 Randolph 3,477 44 $84k $233k 5%
53949 Montello 6,292 38 $65k $206k 4%

Download the 12 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 Green Lake County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Green Lake County and in the neighboring counties
ZIPIn Green LakeElsewhere
5497121%Fond du Lac County 59%; Winnebago County 20%
5492343%Waushara County 48%; Winnebago County 8%
539494%Marquette County 96%
5394693%Fond du Lac County 5%; Marquette County 1%
539565%Columbia County 56%; Dodge County 40%
5496019%Marquette County 62%; Waushara County 19%
5496881%Marquette County 19%
5392310%Columbia County 90%
5392655%Marquette County 26%; Columbia County 19%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Green Lake County's ZIP codes use 2 prefixes: 539 and 549.

Three-digit prefixes of Green Lake 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 Green Lake County's
PrefixSectional centerHereAll codes
539 Madison, WI (SCF 535) 7 51
549 Milwaukee, WI (SCF 530) 5 66

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