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County ZIP codes · Wisconsin · FIPS 55133

Waukesha County, WI ZIP Codes

Waukesha County, Wisconsin has 34 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 29 residential and 5 for PO boxes or a single organization. 26 of the residential ones lie mainly in Waukesha County and 3 mainly in a neighboring county; 9 cross the county line. Median household income ranges from $56,545 in 53225 (Milwaukee) to $157,962 in 53122 (Elm Grove) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Waukesha County?

53005 · Brookfield: $127k53007 · Butler: $60k53017 · Colgate: $154k53018 · Delafield: $125k53029 · Hartland: $108k53036 · Ixonia: $93k53045 · Brookfield: $124k53046 · Lannon: $84k53051 · Menomonee Falls: $100k53058 · Nashotah: $104k53066 · Oconomowoc: $113k53069 · Okauchee: $131k53072 · Pewaukee: $99k53089 · Sussex: $121k53103 · Big Bend: $137k53118 · Dousman: $109k53119 · Eagle: $118k53122 · Elm Grove: $158k53127 · Genesee Depot: –53146 · New Berlin: $110k53149 · Mukwonago: $111k53150 · Muskego: $109k53151 · New Berlin: $101k53153 · North Prairie: $153k53183 · Wales: $109k53186 · Waukesha: $75k53188 · Waukesha: $92k53189 · Waukesha: $117k53225 · Milwaukee: $57k5306653149531895302953119531185303653072531505318853051530895301753186530185314653151530055310353045530585315353225531835312253005 · Brookfield: $127k53007 · Butler: $60k53017 · Colgate: $154k53018 · Delafield: $125k53029 · Hartland: $108k53036 · Ixonia: $93k53045 · Brookfield: $124k53046 · Lannon: $84k53051 · Menomonee Falls: $100k53058 · Nashotah: $104k53066 · Oconomowoc: $113k53069 · Okauchee: $131k53072 · Pewaukee: $99k53089 · Sussex: $121k53103 · Big Bend: $137k53118 · Dousman: $109k53119 · Eagle: $118k53122 · Elm Grove: $158k53127 · Genesee Depot: –53146 · New Berlin: $110k53149 · Mukwonago: $111k53150 · Muskego: $109k53151 · New Berlin: $101k53153 · North Prairie: $153k53183 · Wales: $109k53186 · Waukesha: $75k53188 · Waukesha: $92k53189 · Waukesha: $117k53225 · Milwaukee: $57k530665314953189530295311953118530365307253150531885305153089530175318653018531465315153005531035304553153532255318353005 · Brookfield: $127k53007 · Butler: $60k53017 · Colgate: $154k53018 · Delafield: $125k53029 · Hartland: $108k53036 · Ixonia: $93k53045 · Brookfield: $124k53046 · Lannon: $84k53051 · Menomonee Falls: $100k53058 · Nashotah: $104k53066 · Oconomowoc: $113k53069 · Okauchee: $131k53072 · Pewaukee: $99k53089 · Sussex: $121k53103 · Big Bend: $137k53118 · Dousman: $109k53119 · Eagle: $118k53122 · Elm Grove: $158k53127 · Genesee Depot: –53146 · New Berlin: $110k53149 · Mukwonago: $111k53150 · Muskego: $109k53151 · New Berlin: $101k53153 · North Prairie: $153k53183 · Wales: $109k53186 · Waukesha: $75k53188 · Waukesha: $92k53189 · Waukesha: $117k53225 · Milwaukee: $57k5306653149531895302953119531185303653072531505318853051530895301753186
The residential ZIP codes of Waukesha 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 $100,031 and $120,875.

They carry 25 postal town names.

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

All 29 residential ZIP codes in Waukesha County

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

Residential ZIP codes mainly in Waukesha County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
53051 Menomonee Falls 39,559 1,188 $100k $368k 100%
53066 Oconomowoc 37,558 364 $113k $428k 69%
53188 Waukesha 34,892 1,301 $92k $349k 100%
53186 Waukesha 33,374 2,651 $75k $301k 100%
53151 New Berlin 32,824 1,873 $101k $371k 100%
53189 Waukesha 26,855 561 $117k $406k 100%
53150 Muskego 26,259 767 $109k $416k 95%
53072 Pewaukee 26,200 878 $99k $438k 100%
53045 Brookfield 23,329 1,618 $124k $458k 100%
53029 Hartland 21,778 579 $108k $479k 97%
53005 Brookfield 21,675 1,476 $127k $416k 100%
53089 Sussex 20,588 766 $121k $419k 100%
53149 Mukwonago 19,614 339 $111k $414k 84%
53018 Delafield 8,201 731 $125k $521k 100%
53118 Dousman 7,554 192 $109k $373k 87%
53146 New Berlin 7,285 398 $110k $346k 100%
53122 Elm Grove 6,508 1,991 $158k $515k 100%
53119 Eagle 5,803 145 $118k $417k 89%
53103 Big Bend 3,762 309 $137k $398k 100%
53058 Nashotah 3,405 613 $104k $585k 100%
53183 Wales 3,111 879 $109k $399k 100%
53153 North Prairie 2,548 534 $153k $430k 100%
53007 Butler 1,859 2,417 $60k $245k 100%
53046 Lannon 1,482 600 $84k $260k 100%
53069 Okauchee 671 1,729 $131k $344k 100%
53127 Genesee Depot 79 97 – – 100%

Partly in Waukesha County

Residential ZIP codes mainly in another county that reach at least 1% into Waukesha County, by their share here
In this county
53017 Colgate 5,458 316 $154k $522k 12%
53036 Ixonia 3,730 130 $93k $352k 5%
53225 Milwaukee 25,187 3,606 $57k $188k 1%

Download the 34 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 Waukesha County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Waukesha County and in the neighboring counties
ZIPIn WaukeshaElsewhere
5306669%Jefferson County 17%; Dodge County 14%
5315095%Racine County 5%
532251%Milwaukee County 99%
5302997%Washington County 3%
5314984%Walworth County 9%; Racine County 7%
5311887%Jefferson County 13%
5311989%Walworth County 9%; Jefferson County 2%
5301712%Washington County 88%
530365%Jefferson County 71%; Dodge County 25%

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

PO Box and single-organization ZIP codes

ZIP codes in Waukesha County without a residential area (GeoNames postal codes)
ZIPPostal name
53008Brookfield
53052Menomonee Falls
53056Merton
53064North Lake
53187Waukesha

Source: GeoNames postal codes (CC BY 4.0).

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Waukesha County's ZIP codes use 3 prefixes: 530, 531 and 532.

Three-digit prefixes of Waukesha 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 Waukesha County's
PrefixSectional centerHereAll codes
530 Milwaukee, WI (SCF 530) 18 83
531 Milwaukee, WI (SCF 530) 15 66
532 Milwaukee, WI (SCF 530) 1 42

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