• county
  • FIPS 55121
  • Largest town: Arcadia

Trempealeau County, Wisconsin

Trempealeau County had 30,801 residents in the Census Vintage 2024 estimate, on 733.0 square miles of land. It ranks 43rd of 72 in Wisconsin by population and 38th by land area.

Population
30,801
#43 of 72 in Wisconsin · #1,421 in US
Area
733.0 sq mi
#38 of 72 in Wisconsin · #1,208 in US
Density
42 / sq mi
#40 of 72 in Wisconsin · #1,630 in US
Median household income
$69,119
#41 of 72 in Wisconsin · #1,062 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Trempealeau County within Wisconsin. Pin: Madison.

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Trempealeau County population, land area and income

Trempealeau County had 30,801 residents in the Census Vintage 2024 estimate, on 733.0 square miles of land. It ranks 43rd of 72 in Wisconsin by population and 38th by land area. That works out to 42.0 people per square mile, below the US average of 96.3, and below the national county median.

The median county-equivalent in Wisconsin has 41,821 residents; Trempealeau County is somewhat smaller.

Its SAIPE 2023 median household income of $69,119 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

30,801

3144th1st

1421st of 3,144 (US)

Land area

733 sq mi

3144th1st

1208th of 3,144 (US)

Density

42.0 / sq mi

3144th1st

1630th of 3,144 (US)

Median household income

$69,119

3143rd1st

1062nd of 3,143 (US)

Rank within Wisconsin (72)

Population

30,801

72nd1st

43rd of 72 (WI)

Land area

733 sq mi

72nd1st

38th of 72 (WI)

Density

42.0 / sq mi

72nd1st

40th of 72 (WI)

Median household income

$69,119

72nd1st

41st of 72 (WI)

How Trempealeau County's population changed since 2020

Trempealeau County lost 12 residents between the July 2020 and July 2024 estimates, a drop of 0.0%. That ranks 60th of 72 in Wisconsin for growth. The median Wisconsin county changed by +1.0%, and the state as a whole by +1.1%.

Since the April 2020 estimates base, Trempealeau County recorded 1,603 births and 1,249 deaths, a natural change of +354. Net international migration added +268 and net domestic migration, people moving to or from other US counties, came to -569. The largest single component was domestic migration, which removed 569 people.

30.8k202030.7k202130.9k202230.9k202330.8k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
1,603
Deaths
1,249
Net international migration
+268
Net domestic migration
-569
Change, July 2023 to July 2024
-138

Where Trempealeau County is

The Census internal point of Trempealeau County is at 44.303100, -91.358900. It sits in UTM zone 15N. The map shades Wisconsin's 72 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Trempealeau County outlined. Dots are towns of 1,000+ people with residents in it.

Barron County: +0.2%Green County: +0.4%Dunn County: +1.5%Jefferson County: +0.0%Lincoln County: +0.1%Rusk County: -0.1%Fond du Lac County: +0.1%Marquette County: +1.0%Outagamie County: +2.3%Waupaca County: -1.2%Oneida County: +0.8%Eau Claire County: +2.8%Washington County: +1.4%Portage County: +2.3%Menominee County: +0.7%Clark County: +0.5%Monroe County: +0.2%Milwaukee County: -1.5%Buffalo County: +1.1%Lafayette County: +4.2%Ozaukee County: +2.5%Rock County: +1.0%Sheboygan County: +0.2%Green Lake County: +1.8%Waukesha County: +2.3%Calumet County: +2.1%Dodge County: -0.8%Wood County: -0.3%Winnebago County: +0.9%Sawyer County: +4.0%Dane County: +4.6%Sauk County: +1.1%Pepin County: +2.9%Adams County: +3.2%Price County: +0.4%Taylor County: +1.1%Grant County: +0.7%Trempealeau County: -0.0%Vernon County: +2.1%Waushara County: +2.2%Iowa County: +1.0%Crawford County: -0.5%Kenosha County: -0.3%Shawano County: +1.1%Juneau County: -0.7%Jackson County: -0.3%Vilas County: +3.7%Bayfield County: +3.7%Chippewa County: +1.5%Iron County: +1.5%Racine County: +0.3%Door County: +1.3%Ashland County: +1.1%Kewaunee County: +0.9%Polk County: +1.8%Florence County: +2.4%Douglas County: -0.2%Forest County: +3.7%Columbia County: -0.7%Walworth County: +0.7%La Crosse County: +0.1%Manitowoc County: +0.1%Oconto County: +2.5%Langlade County: +0.4%Marathon County: +0.7%Washburn County: +2.2%Brown County: +1.8%Richland County: -0.9%Marinette County: +1.1%St. Croix County: +4.3%Pierce County: +2.7%Burnett County: +3.7%
Change 2020 to 2024
  1. < +0.1%
  2. < +0.7%
  3. < +1.3%
  4. < +2.3%
  5. ≥ +2.3%
no data

Orange pin: Trempealeau County internal point. Dark pin: Madison.

Internal point

Decimal
44.303100, -91.358900
DMS
44°18'11.16"N 91°21'32.04"W
UTM
15N 630902.5E 4906848.0N
Geohash
9zzh114kr
Plus code
86PC8J3R+6C

Towns in Trempealeau County

8 incorporated places of 1,000+ people have residents in Trempealeau County, 14,608 people together, or 47% of the county. Each figure counts only the part of the town inside Trempealeau County; towns marked "part" extend into another county. The largest is Arcadia with 3,821.

  1. 01Arcadia3,821
  2. 02Trempealeau1,856
  3. 03Osseo1,818
  4. 04Galesville1,663
  5. 05Whitehall1,618
  6. 06Independence1,480
  7. 07Blair1,284
  8. 08Strum1,068
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Trempealeau County

The Census 2024 county adjacency file lists 5 neighbors for Trempealeau County, including 1 across a state line. The most populous is La Crosse County, WI, with 121,060 residents. Distances run between Census internal points in a straight line.

Distance to Madison and the nearest big city

Madison is 130.1 miles SE of Trempealeau County's internal point in a straight line. The nearest place of 100,000 or more is Rochester, MN (population 123,624), 59.0 miles away. The nearest place of 10,000 or more is Winona, MN (population 26,173), 23.2 miles away.

Trempealeau County FIPS code

The FIPS code of Trempealeau County is 55121: state code 55 for Wisconsin plus county code 121. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $69,119.

Questions people ask

What is the population of Trempealeau County, Wisconsin?

The Census Vintage 2024 estimate for July 1, 2024 is 30,801. That is down 12 people (0.0%) from the July 2020 estimate of 30,813.

What is the FIPS code of Trempealeau County?

55121. The first two digits (55) are Wisconsin; the last three (121) identify the county.

What is the largest town in Trempealeau County?

Arcadia, with 3,821 residents inside Trempealeau County in 2024.

Which counties border Trempealeau County?

5 county-equivalents border it in the Census 2024 adjacency file: La Crosse County, WI; Eau Claire County, WI; Winona County, MN; Jackson County, WI; Buffalo County, WI.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.