Last official estimated population of Sierra County was 3,221 (year 2014)[1]. This was 0.001% of total US population and 0% of total California state population. Area of Sierra County is 962.2 mi² (=2492 km²), in this year population density was 3.35 p/mi². If population growth rate would be same as in period 2010-2014 (-0.15%/yr), Sierra County population in 2026 would be 3,165 [0].
Historical population of Sierra 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] -6.82 %/yr
[1870-1880] +1.66 %/yr
[1880-1890] -2.67 %/yr
[1890-1900] -2.26 %/yr
[1900-1910] +0.2 %/yr
[1910-1920] -7.99 %/yr
[1920-1930] +3.11 %/yr
[1930-1940] +2.25 %/yr
[1940-1950] -2.25 %/yr
[1950-1960] -0.7 %/yr
[1960-1970] +0.51 %/yr
[1970-1980] +2.65 %/yr
[1980-1990] +0.77 %/yr
[1990-2000] +0.7 %/yr
[2000-2005] -1.04 %/yr
[2005-2010] -0.83 %/yr
[2010-2014] -0.15 %/yr
Looking for settlements in Sierra County? Visit this page: Settlements in Sierra County, CA
Population of Sierra County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 43 | 57 | 100 |
| 5 to 9 | 74 | 74 | 148 |
| 10 to 14 | 74 | 66 | 140 |
| 15 to 19 | 84 | 64 | 148 |
| 20 to 24 | 70 | 51 | 121 |
| 25 to 29 | 47 | 38 | 85 |
| 30 to 34 | 61 | 70 | 131 |
| 35 to 39 | 68 | 64 | 132 |
| 40 to 44 | 61 | 78 | 139 |
| 45 to 49 | 78 | 88 | 166 |
| 50 to 54 | 132 | 129 | 261 |
| 55 to 59 | 128 | 157 | 285 |
| 60 to 64 | 173 | 169 | 342 |
| 65 to 69 | 164 | 154 | 318 |
| 70 to 74 | 98 | 97 | 195 |
| 75 to 79 | 64 | 57 | 121 |
| 80 to 84 | 50 | 59 | 109 |
| 85+ | 33 | 29 | 62 |
Sierra 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 | 1449 | 1462 | 2,911 |
| WA | 1413 | 1435 | 2,848 |
| NH | 1353 | 1359 | 2,712 |
| NHWAC | 1312 | 1322 | 2,634 |
| NHWA | 1283 | 1305 | 2,588 |
| H | 149 | 142 | 291 |
| HWAC | 137 | 140 | 277 |
| HWA | 130 | 130 | 260 |
| IAC | 47 | 36 | 83 |
| TOM | 39 | 30 | 69 |
| NHIAC | 36 | 31 | 67 |
| IA | 33 | 24 | 57 |
| NHTOM | 31 | 20 | 51 |
| NHIA | 24 | 22 | 46 |
| BAC | 24 | 14 | 38 |
| AAC | 15 | 17 | 32 |
| NHBAC | 19 | 9 | 28 |
| NHAAC | 13 | 15 | 28 |
| HTOM | 8 | 10 | 18 |
| HIAC | 11 | 5 | 16 |
| AA | 6 | 9 | 15 |
| NHAA | 6 | 9 | 15 |
| BA | 9 | 2 | 11 |
| HIA | 9 | 2 | 11 |
| HBAC | 5 | 5 | 10 |
| NHBA | 7 | 2 | 9 |
| NAC | 6 | 2 | 8 |
| NHNAC | 4 | 2 | 6 |
| HAAC | 2 | 2 | 4 |
| NA | 2 | 1 | 3 |
| NHNA | 2 | 1 | 3 |
| HNAC | 2 | 0 | 2 |
| HBA | 2 | 0 | 2 |
| HAA | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
• Placer County population
37.2 mi, 
196°
• Butte County
57.8 mi, 
276°
• El Dorado County
54.7 mi, 
180°
• Nevada County
23.4 mi, 
214°
• Sutter County
73.4 mi, 
239°
• Yuba County
48.7 mi, 243°
• Carson City
50.7 mi, 
125°
• Douglas County
67.4 mi, 133°
• Plumas County
32.9 mi, 
330°
• Storey County
54 mi, 
100°
[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
*Yuba California Notes
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