Last official estimated population of Solano County was 414,101 (year 2014)[1]. This was 0.13% of total US population and 1.1% of total California state population. Area of Solano County is 906.2 mi² (=2347 km²), in this year population density was 456.97 p/mi². If population growth rate would be same as in period 2010-2014 (+0.05%/yr), Solano County population in 2024 would be 416,000 [0].
Historical population of Solano County for period 1850-2014 [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
[1850-1860] +28.59 %/yr
[1860-1870] +8.94 %/yr
[1870-1880] +0.91 %/yr
[1880-1890] +1.26 %/yr
[1890-1900] +1.43 %/yr
[1900-1910] +1.33 %/yr
[1910-1920] +3.95 %/yr
[1920-1930] +0.06 %/yr
[1930-1940] +1.86 %/yr
[1940-1950] +7.88 %/yr
[1950-1960] +2.53 %/yr
[1960-1970] +2.36 %/yr
[1970-1980] +3.3 %/yr
[1980-1990] +3.74 %/yr
[1990-2000] +1.51 %/yr
[2000-2005] +0.68 %/yr
[2005-2010] +0.25 %/yr
[2010-2014] +0.05 %/yr
Looking for settlements in Solano County? Visit this page: Settlements in Solano County, CA
Population of Solano County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 13210 | 12745 | 25,955 |
| 5 to 9 | 14341 | 13512 | 27,853 |
| 10 to 14 | 14197 | 13644 | 27,841 |
| 15 to 19 | 14361 | 13318 | 27,679 |
| 20 to 24 | 16832 | 14972 | 31,804 |
| 25 to 29 | 16355 | 15254 | 31,609 |
| 30 to 34 | 15286 | 14382 | 29,668 |
| 35 to 39 | 13117 | 12991 | 26,108 |
| 40 to 44 | 13514 | 13515 | 27,029 |
| 45 to 49 | 14205 | 14006 | 28,211 |
| 50 to 54 | 15728 | 16310 | 32,038 |
| 55 to 59 | 14839 | 15957 | 30,796 |
| 60 to 64 | 12561 | 13703 | 26,264 |
| 65 to 69 | 10049 | 11168 | 21,217 |
| 70 to 74 | 6240 | 7320 | 13,560 |
| 75 to 79 | 4197 | 5331 | 9,528 |
| 80 to 84 | 2909 | 4130 | 7,039 |
| 85+ | 2438 | 4494 | 6,932 |
Solano 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 | 157863 | 162746 | 320,609 |
| WAC | 144022 | 141124 | 285,146 |
| WA | 132139 | 129020 | 261,159 |
| NHWAC | 94154 | 93940 | 188,094 |
| NHWA | 85529 | 85003 | 170,532 |
| H | 56516 | 54006 | 110,522 |
| HWAC | 49868 | 47184 | 97,052 |
| HWA | 46610 | 44017 | 90,627 |
| AAC | 38519 | 44334 | 82,853 |
| NHAAC | 35105 | 40861 | 75,966 |
| BAC | 37785 | 37605 | 75,390 |
| NHBAC | 34239 | 33899 | 68,138 |
| AA | 30770 | 36447 | 67,217 |
| BA | 32137 | 31709 | 63,846 |
| NHAA | 28950 | 34545 | 63,495 |
| NHBA | 29991 | 29424 | 59,415 |
| TOM | 14321 | 14711 | 29,032 |
| NHTOM | 10580 | 11033 | 21,613 |
| IAC | 6159 | 6243 | 12,402 |
| NAC | 4433 | 4535 | 8,968 |
| HTOM | 3741 | 3678 | 7,419 |
| HBAC | 3546 | 3706 | 7,252 |
| NHNAC | 3444 | 3565 | 7,009 |
| HAAC | 3414 | 3473 | 6,887 |
| HIAC | 3261 | 3154 | 6,415 |
| NHIAC | 2898 | 3089 | 5,987 |
| IA | 2771 | 2644 | 5,415 |
| NA | 2241 | 2221 | 4,462 |
| HBA | 2146 | 2285 | 4,431 |
| HAA | 1820 | 1902 | 3,722 |
| NHNA | 1803 | 1797 | 3,600 |
| HIA | 1761 | 1700 | 3,461 |
| HNAC | 989 | 970 | 1,959 |
| NHIA | 1010 | 944 | 1,954 |
| HNA | 438 | 424 | 862 |
• Alameda County population
42.8 mi, 
178°
• Sacramento County
34.8 mi, 
68°
• Contra Costa County
24 mi, 181°
• San Mateo County
63.4 mi, 
201°
• San Joaquin County
42.9 mi, 
122°
• Sonoma County
56.3 mi, 
288°
• Marin County
46.3 mi, 
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• Yolo County
28.6 mi, 
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• Napa County
26.7 mi, 
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• Sutter County
54.6 mi, 
13°
[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
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