First three digits · Wisconsin
ZIP Codes Starting with
51 ZIP codes start with 539, sorted at the Madison, WI (SCF 535) sectional center (USPS labeling list L005, effective October 1, 2026) in Wisconsin: 48 residential ZIP codes across 9 counties and 3 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 539 mean?
The first digit, 5, is one of ten national areas (Iowa, Minnesota, Montana, North Dakota, South Dakota and Wisconsin). The first three, 539, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 539 to the Madison, WI (SCF 535) facility. The last two digits pick the delivery area. By residents, the largest town names among the 539 ZIP codes are Beaver Dam, Baraboo, Reedsburg, Portage, Waupun and Wisconsin Dells.
The same facility sorts 4 prefixes, 195 ZIP codes in all: 535, 537, 538, 539.
Where are the 539 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 539
| County | ||||||
|---|---|---|---|---|---|---|
| 53901 | Portage | Columbia County | 14,291 | 97 | $74k | $228k |
| 53910 | Adams | Adams County | 3,522 | 62 | $50k | $140k |
| 53911 | Arlington | Columbia County | 1,450 | 40 | $101k | $296k |
| 53913 | Baraboo | Sauk County | 21,704 | 156 | $75k | $235k |
| 53916 | Beaver Dam | Dodge County | 22,808 | 220 | $71k | $220k |
| 53919 | Brandon | Fond du Lac County | 2,292 | 35 | $97k | $223k |
| 53920 | Briggsville | Marquette County | 599 | 105 | $69k | $244k |
| 53922 | Burnett | Dodge County | 1,057 | 26 | $92k | $288k |
| 53923 | Cambria | Columbia County | 2,295 | 30 | $73k | $221k |
| 53924 | Cazenovia | Richland County | 1,346 | 19 | $72k | $222k |
| 53925 | Columbus | Columbia County | 8,754 | 69 | $84k | $268k |
| 53926 | Dalton | Green Lake County | 1,951 | 38 | $63k | $227k |
| 53927 | Dellwood | Adams County | PO Box or unique | – | – | – |
| 53928 | Doylestown | Columbia County | 63 | 64 | $86k | $138k |
| 53929 | Elroy | Juneau County | 2,808 | 38 | $66k | $187k |
| 53930 | Endeavor | Marquette County | 1,192 | 29 | $73k | $224k |
| 53931 | Fairwater | Fond du Lac County | 350 | 476 | $71k | $146k |
| 53932 | Fall River | Columbia County | 2,495 | 66 | $86k | $309k |
| 53933 | Fox Lake | Dodge County | 4,227 | 112 | $84k | $261k |
| 53934 | Friendship | Adams County | 4,520 | 37 | $49k | $166k |
| 53935 | Friesland | Columbia County | 297 | 296 | $86k | $151k |
| 53936 | Grand Marsh | Adams County | 1,231 | 19 | $56k | $138k |
| 53937 | Hillpoint | Sauk County | 1,157 | 22 | $87k | $318k |
| 53939 | Kingston | Green Lake County | 251 | 246 | $71k | $148k |
| 53940 | Lake Delton | Sauk County | no residents | 0 | – | – |
| 53941 | La Valle | Sauk County | 2,817 | 41 | $83k | $261k |
| 53942 | Lime Ridge | Sauk County | 235 | 178 | $112k | $133k |
| 53943 | Loganville | Sauk County | 1,245 | 25 | $73k | $226k |
| 53944 | Lyndon Station | Juneau County | 2,207 | 28 | $73k | $202k |
| 53946 | Markesan | Green Lake County | 4,333 | 34 | $73k | $246k |
| 53947 | Marquette | Green Lake County | 223 | 639 | $56k | $240k |
| 53948 | Mauston | Juneau County | 8,195 | 54 | $63k | $182k |
| 53949 | Montello | Marquette County | 6,292 | 38 | $65k | $206k |
| 53950 | New Lisbon | Juneau County | 5,942 | 61 | $73k | $197k |
| 53951 | North Freedom | Sauk County | 2,452 | 34 | $72k | $190k |
| 53952 | Oxford | Marquette County | 3,524 | 36 | $64k | $195k |
| 53953 | Packwaukee | Marquette County | 213 | 630 | $46k | $115k |
| 53954 | Pardeeville | Columbia County | 6,678 | 84 | $83k | $279k |
| 53955 | Poynette | Columbia County | 6,125 | 84 | $101k | $332k |
| 53956 | Randolph | Columbia County | 3,477 | 44 | $84k | $233k |
| 53957 | Randolph | Columbia County | PO Box or unique | – | – | – |
| 53958 | Reedsburg | Sauk County | PO Box or unique | – | – | – |
| 53959 | Reedsburg | Sauk County | 14,451 | 129 | $78k | $255k |
| 53960 | Rio | Columbia County | 3,396 | 38 | $85k | $282k |
| 53961 | Rock Springs | Sauk County | 831 | 35 | $77k | $211k |
| 53962 | Union Center | Juneau County | 27 | 1,038 | $28k | $117k |
| 53963 | Waupun | Fond du Lac County | 13,952 | 155 | $78k | $209k |
| 53964 | Westfield | Marquette County | 3,371 | 31 | $69k | $218k |
| 53965 | Wisconsin Dells | Adams County | 10,818 | 64 | $67k | $227k |
| 53968 | Wonewoc | Juneau County | 2,429 | 32 | $75k | $208k |
| 53969 | Wyocena | Columbia County | 329 | 539 | $77k | $191k |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.