Last official estimated population of Lake County was 64,757 (year 2014)[1]. This was 0.02% of total US population and 0.2% of total California state population. Area of Lake County is 1,329.4 mi² (=3443.2 km²), in this year population density was 48.71 p/mi². If population growth rate would be same as in period 2010-2014 (+0.04%/yr), Lake County population in 2026 would be 65,034 [0].
Historical population of Lake County for period 1870-2014 [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

[1870-1880] +8.31 %/yr
[1880-1890] +0.74 %/yr
[1890-1900] -1.64 %/yr
[1900-1910] -0.85 %/yr
[1910-1920] -0.23 %/yr
[1920-1930] +2.87 %/yr
[1930-1940] +1.19 %/yr
[1940-1950] +3.59 %/yr
[1950-1960] +1.85 %/yr
[1960-1970] +3.55 %/yr
[1970-1980] +6.4 %/yr
[1980-1990] +3.36 %/yr
[1990-2000] +1.43 %/yr
[2000-2005] +1.81 %/yr
[2005-2010] +0.27 %/yr
[2010-2014] +0.04 %/yr
Looking for settlements in Lake County? Visit this page: Settlements in Lake County, CA
Population of Lake County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1883 | 1814 | 3,697 |
| 5 to 9 | 1895 | 1701 | 3,596 |
| 10 to 14 | 1798 | 1749 | 3,547 |
| 15 to 19 | 1892 | 1663 | 3,555 |
| 20 to 24 | 1817 | 1702 | 3,519 |
| 25 to 29 | 1847 | 1665 | 3,512 |
| 30 to 34 | 1773 | 1646 | 3,419 |
| 35 to 39 | 1665 | 1531 | 3,196 |
| 40 to 44 | 1619 | 1749 | 3,368 |
| 45 to 49 | 1908 | 1997 | 3,905 |
| 50 to 54 | 2316 | 2435 | 4,751 |
| 55 to 59 | 2645 | 2865 | 5,510 |
| 60 to 64 | 2614 | 2761 | 5,375 |
| 65 to 69 | 2455 | 2346 | 4,801 |
| 70 to 74 | 1600 | 1688 | 3,288 |
| 75 to 79 | 1101 | 1138 | 2,239 |
| 80 to 84 | 685 | 760 | 1,445 |
| 85+ | 602 | 859 | 1,461 |
Lake 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 | 29407 | 29384 | 58,791 |
| WA | 28129 | 28139 | 56,268 |
| NH | 25777 | 26174 | 51,951 |
| NHWAC | 23841 | 24238 | 48,079 |
| NHWA | 22923 | 23323 | 46,246 |
| H | 6338 | 5895 | 12,233 |
| HWAC | 5566 | 5146 | 10,712 |
| HWA | 5206 | 4816 | 10,022 |
| IAC | 2131 | 2132 | 4,263 |
| TOM | 1458 | 1426 | 2,884 |
| NHIAC | 1273 | 1349 | 2,622 |
| IA | 1297 | 1318 | 2,615 |
| BAC | 1124 | 984 | 2,108 |
| NHTOM | 1043 | 1058 | 2,101 |
| NHBAC | 947 | 819 | 1,766 |
| HIAC | 858 | 783 | 1,641 |
| AAC | 742 | 813 | 1,555 |
| NHIA | 736 | 786 | 1,522 |
| BA | 743 | 613 | 1,356 |
| NHAAC | 634 | 698 | 1,332 |
| NHBA | 659 | 522 | 1,181 |
| HIA | 561 | 532 | 1,093 |
| AA | 401 | 494 | 895 |
| HTOM | 415 | 368 | 783 |
| NHAA | 348 | 428 | 776 |
| NAC | 230 | 239 | 469 |
| NHNAC | 181 | 178 | 359 |
| HBAC | 177 | 165 | 342 |
| HAAC | 108 | 115 | 223 |
| HBA | 84 | 91 | 175 |
| NA | 87 | 79 | 166 |
| NHNA | 68 | 57 | 125 |
| HAA | 53 | 66 | 119 |
| HNAC | 49 | 61 | 110 |
| HNA | 19 | 22 | 41 |
• Sonoma County population
40.5 mi,
193°
• Solano County
71.9 mi,
142°
• Marin County
72.1 mi,
179°
• Butte County
72.8 mi,
57°
• Yolo County
53.7 mi,
122°
• Napa County
46.5 mi,
150°
• Sutter County
56.1 mi,
94°
• Mendocino County
43.9 mi,
302°
• Glenn County
39.6 mi,
27°
• Colusa County
27.9 mi,
78°
[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
*Napa, Colusa, Mendocino California Notes
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