Last official estimated population of Eau Claire County was 99,018 (year 2014)[1]. This was 0.031% of total US population and 1.7% of total Wisconsin state population. Area of Eau Claire County is 645.2 mi² (=1671.1 km²), in this year population density was 153.47 p/mi². If population growth rate would be same as in period 2010-2014 (+0.07%/yr), Eau Claire County population in 2026 would be 99,869 [0].
Historical population of Eau Claire 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] +13.04 %/yr
[1870-1880] +6.38 %/yr
[1880-1890] +4.37 %/yr
[1890-1900] +0.33 %/yr
[1900-1910] +0.32 %/yr
[1910-1920] +0.9 %/yr
[1920-1930] +1.4 %/yr
[1930-1940] +1.35 %/yr
[1940-1950] +1.43 %/yr
[1950-1960] +0.73 %/yr
[1960-1970] +1.43 %/yr
[1970-1980] +1.6 %/yr
[1980-1990] +0.78 %/yr
[1990-2000] +0.9 %/yr
[2000-2005] +0.4 %/yr
[2005-2010] +0.77 %/yr
[2010-2014] +0.07 %/yr
Looking for settlements in Eau Claire County? Visit this page: Settlements in Eau Claire County, WI
Population of Eau Claire County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 3182 | 2752 | 5,934 |
| 5 to 9 | 3025 | 2769 | 5,794 |
| 10 to 14 | 2976 | 2695 | 5,671 |
| 15 to 19 | 3707 | 4183 | 7,890 |
| 20 to 24 | 6094 | 6790 | 12,884 |
| 25 to 29 | 3728 | 3477 | 7,205 |
| 30 to 34 | 3525 | 3240 | 6,765 |
| 35 to 39 | 2880 | 2630 | 5,510 |
| 40 to 44 | 2772 | 2664 | 5,436 |
| 45 to 49 | 2765 | 2795 | 5,560 |
| 50 to 54 | 3267 | 3212 | 6,479 |
| 55 to 59 | 3091 | 3208 | 6,299 |
| 60 to 64 | 2784 | 3062 | 5,846 |
| 65 to 69 | 2289 | 2425 | 4,714 |
| 70 to 74 | 1545 | 1680 | 3,225 |
| 75 to 79 | 977 | 1310 | 2,287 |
| 80 to 84 | 758 | 1070 | 1,828 |
| 85+ | 732 | 1505 | 2,237 |
Eau Claire 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 |
| NH | 48829 | 50436 | 99,265 |
| WAC | 47116 | 48794 | 95,910 |
| WA | 46316 | 47948 | 94,264 |
| NHWAC | 46008 | 47892 | 93,900 |
| NHWA | 45287 | 47112 | 92,399 |
| AAC | 2149 | 2190 | 4,339 |
| NHAAC | 2122 | 2149 | 4,271 |
| AA | 1884 | 1928 | 3,812 |
| NHAA | 1867 | 1899 | 3,766 |
| H | 1268 | 1031 | 2,299 |
| HWAC | 1108 | 902 | 2,010 |
| HWA | 1029 | 836 | 1,865 |
| BAC | 1030 | 834 | 1,864 |
| TOM | 859 | 895 | 1,754 |
| NHBAC | 958 | 753 | 1,711 |
| NHTOM | 772 | 823 | 1,595 |
| IAC | 638 | 536 | 1,174 |
| BA | 636 | 423 | 1,059 |
| NHBA | 598 | 376 | 974 |
| NHIAC | 488 | 458 | 946 |
| IA | 369 | 247 | 616 |
| NHIA | 275 | 205 | 480 |
| HIAC | 150 | 78 | 228 |
| HTOM | 87 | 72 | 159 |
| HBAC | 72 | 81 | 153 |
| HIA | 94 | 42 | 136 |
| NAC | 67 | 53 | 120 |
| NHNAC | 62 | 44 | 106 |
| HBA | 38 | 47 | 85 |
| HAAC | 27 | 41 | 68 |
| NA | 33 | 26 | 59 |
| NHNA | 30 | 21 | 51 |
| HAA | 17 | 29 | 46 |
| HNAC | 5 | 9 | 14 |
| HNA | 3 | 5 | 8 |
• Chippewa County population
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[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
*Chippewa Wisconsin Notes
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