Last official estimated population of Trempealeau County was 28,853 (year 2014)[1]. This was 0.009% of total US population and 0.5% of total Wisconsin state population. Area of Trempealeau County is 742.0 mi² (=1921.8 km²), in this year population density was 38.88 p/mi². If population growth rate would be same as in period 2010-2014 (+0.03%/yr), Trempealeau County population in 2024 would be 28,946 [0].
Historical population of Trempealeau County for period 1860-2014 [1] , [2] , [3]:
Estimated population for 2014[1]. Population density is in p./sq.mi [4]. Changes are for period 2010-2015. Value is %/year. Boundary lines are approx. 2012 [5]. Click on flag to hide it.
Population • Density • Changes • Legends • Position
[1860-1870] +15.41 %/yr
[1870-1880] +4.82 %/yr
[1880-1890] +0.96 %/yr
[1890-1900] +2.02 %/yr
[1900-1910] -0.08 %/yr
[1910-1920] +0.67 %/yr
[1920-1930] -0.25 %/yr
[1930-1940] +0.2 %/yr
[1940-1950] -0.27 %/yr
[1950-1960] -0.15 %/yr
[1960-1970] -0.01 %/yr
[1970-1980] +1.14 %/yr
[1980-1990] -0.35 %/yr
[1990-2000] +0.67 %/yr
[2000-2005] +0.78 %/yr
[2005-2010] +0.53 %/yr
[2010-2014] +0.03 %/yr
Looking for settlements in Trempealeau County? Visit this page: Settlements in Trempealeau County, WI
Population of Trempealeau County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 984 | 1033 | 2,017 |
| 5 to 9 | 1005 | 971 | 1,976 |
| 10 to 14 | 1020 | 990 | 2,010 |
| 15 to 19 | 941 | 883 | 1,824 |
| 20 to 24 | 805 | 770 | 1,575 |
| 25 to 29 | 764 | 726 | 1,490 |
| 30 to 34 | 883 | 841 | 1,724 |
| 35 to 39 | 874 | 802 | 1,676 |
| 40 to 44 | 930 | 893 | 1,823 |
| 45 to 49 | 1035 | 990 | 2,025 |
| 50 to 54 | 1174 | 1060 | 2,234 |
| 55 to 59 | 1104 | 1050 | 2,154 |
| 60 to 64 | 1033 | 948 | 1,981 |
| 65 to 69 | 775 | 731 | 1,506 |
| 70 to 74 | 577 | 569 | 1,146 |
| 75 to 79 | 431 | 479 | 910 |
| 80 to 84 | 266 | 374 | 640 |
| 85+ | 284 | 514 | 798 |
Trempealeau County resident population estimates by Sex, Race, and Hispanic Origin[1b]. For full list of abbrevations see: population.us/about page.
| Race | Male | Female | Total |
| WAC | 14614 | 14360 | 28,974 |
| WA | 14485 | 14224 | 28,709 |
| NH | 13765 | 13736 | 27,501 |
| NHWAC | 13590 | 13535 | 27,125 |
| NHWA | 13499 | 13432 | 26,931 |
| H | 1120 | 888 | 2,008 |
| HWAC | 1024 | 825 | 1,849 |
| HWA | 986 | 792 | 1,778 |
| IAC | 167 | 141 | 308 |
| TOM | 135 | 143 | 278 |
| BAC | 126 | 127 | 253 |
| AAC | 104 | 133 | 237 |
| NHAAC | 93 | 126 | 219 |
| NHTOM | 96 | 109 | 205 |
| NHBAC | 99 | 102 | 201 |
| AA | 86 | 108 | 194 |
| NHAA | 80 | 102 | 182 |
| IA | 98 | 73 | 171 |
| NHIAC | 79 | 82 | 161 |
| HIAC | 88 | 59 | 147 |
| BA | 69 | 69 | 138 |
| NHBA | 56 | 56 | 112 |
| HIA | 66 | 37 | 103 |
| HTOM | 39 | 34 | 73 |
| NHIA | 32 | 36 | 68 |
| HBAC | 27 | 25 | 52 |
| NAC | 16 | 11 | 27 |
| HBA | 13 | 13 | 26 |
| HNAC | 12 | 7 | 19 |
| NA | 12 | 7 | 19 |
| HAAC | 11 | 7 | 18 |
| HNA | 10 | 6 | 16 |
| HAA | 6 | 6 | 12 |
| NHNAC | 4 | 4 | 8 |
| NHNA | 2 | 1 | 3 |
• La Crosse County population
29.9 mi, 
155°
• Eau Claire County
29.5 mi, 
6°
• Winona County
30.3 mi, 
223°
• Monroe County
44.2 mi, 
124°
• Clark County
47.6 mi, 
50°
• Wabasha County
43.3 mi, 
268°
• Jackson County
27.9 mi, 
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• Houston County
44.5 mi, 
189°
• Buffalo County
20.7 mi, 
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• Pepin County
32.5 mi, 
313°
[0] Calculated by population.us from last known population growth rate, not official data.
[1] County population - 2014, archived from the original, retrieved 02/23/2016
[1b] Annual County Resident Population Estimates by Age, Sex, Race, and Hispanic Origin, (used only data for 2014) archived from the original, retrieved 02/23/2016
[2] County population - 2000-2010, archived from the original, retrieved 02/23/2016
[3] Population of States and Counties of the United States: 1790 to 1992, PDF, 15 Mb, census.gov, retrieved 02/23/2016
[4] County area, latitude longitude data, retrieved 02/23/2016
[5] County boundaries, CSV files on boundaries.us, retrived 03/18/2016
*Crawford; Chippewa Wisconsin Notes
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