53033 FipsDecoder
55057 County FIPS Code

Juneau County

Wisconsin · County seat: Mauston · Active county or equivalent

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FIPS code 55057 is Juneau County, Wisconsin. With a population of 26,695 (2022 ACS estimate), it ranks #46 in Wisconsin and #1578 nationally. The state FIPS code for Wisconsin is 55. This code is used in Census Bureau, BLS, EPA, HUD, and USDA federal datasets to identify this county.

County FIPS

55057

State FIPS

55

WI

Population

26,695

2022 ACS · #1578 nationally

Density

34.8/mi²

people per sq mile

Land Area

767

sq miles

Urban/Rural

Nonmetro — rural, adjacent to metro

RUCC 8

How This FIPS Code Works

55 057
55 = State FIPS (Wisconsin)
057 = County FIPS

The 5-digit FIPS code 55057 is formed by combining the 2-digit state identifier 55 (Wisconsin) with the 3-digit county identifier 057. Together they uniquely identify Juneau County in every US federal dataset. No two counties share the same 5-digit FIPS code.

Census ACS Data for FIPS 55057

From the 2022 ACS 5-year estimates — the same values you'd retrieve by querying the Census API with county FIPS 55057.

Median Household Income

$63,455

ACS B19013_001E

Poverty Rate

14.7%

ACS B17001 (below poverty level)

Median Age

45.7

ACS B01002_001E

Adjacent Counties (7)

Counties that share a border with Juneau County. Useful for regional analysis — these are the geographies you'd typically include when studying labor markets, commuting zones, or environmental spillovers around FIPS 55057.

Federal Datasets Using Code 55057

FIPS code 55057 appears as the county identifier in the following federal datasets. Analysts joining data across these sources use this code as the common geographic key.

Using FIPS Code 55057 in Code

Common patterns for querying federal datasets by this county's FIPS code. The leading zeros are significant — always treat FIPS codes as strings, not integers.

Census ACS API — Python 55057
import requests

url = "https://api.census.gov/data/2022/acs/acs5"
params = {
    "get":  "NAME,B19013_001E,B01003_001E",
    "for":  "county:057",
    "in":   "state:55",
    "key":  "YOUR_CENSUS_API_KEY",
}
r = requests.get(url, params=params)
data = r.json()  # [[header...], [Juneau County, Wisconsin, income, pop, ...]
SQL — filtering by county FIPS 55057
-- 5-digit combined FIPS (state + county)
SELECT * FROM your_table WHERE county_fips = '55057';

-- Some datasets store state and county separately
SELECT * FROM your_table
WHERE state_fips = '55'
  AND county_fips = '057';

-- ⚠ Never cast to integer — leading zeros are lost:
-- county_fips = 55057 is WRONG for this county
R — tidycensus 55057
library(tidycensus)

get_acs(
  geography = "county",
  variables = c(income = "B19013_001E", pop = "B01003_001E"),
  state     = "55",
  county    = "057",
  year      = 2022
)
Zero-padding reminder: FIPS codes must always be stored and compared as zero-padded strings. 55 (not 55) and 057 (not 57) — losing the leading zeros is one of the most common data-join bugs in federal datasets. Full guide →

ZIP Codes in Juneau County

ZIP codes do not align perfectly with county boundaries — a single ZIP code can span multiple counties, and a county can contain parts of many ZIP codes. The ratios below (from the Census 2020 ZCTA relationship file) show the land area share of each ZCTA that falls within Juneau County. Why FIPS ≠ ZIP →

ZIP Code % in county
54637 100.0%
54646 100.0%
53948 100.0%
53950 100.0%
53962 100.0%
53944 83.0%
53929 72.2%
54618 70.3%
53968 55.1%
54457 23.3%
54666 10.7%
53965 6.3%
53941 5.7%
54638 2.7%
54634 0.6%

Other Counties in Wisconsin