Last official estimated population of Napa County was 136,829 (year 2014)[1]. This was 0.043% of total US population and 0.3% of total California state population. Area of Napa County is 788.6 mi² (=2042.4 km²), in this year population density was 173.51 p/mi². If population growth rate would be same as in period 2010-2014 (+0.06%/yr), Napa County population in 2026 would be 137,869 [0].
Historical population of Napa 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] +29.85 %/yr
[1860-1870] +2.64 %/yr
[1870-1880] +6.33 %/yr
[1880-1890] +2.17 %/yr
[1890-1900] +0.02 %/yr
[1900-1910] +1.87 %/yr
[1910-1920] +0.43 %/yr
[1920-1930] +1.02 %/yr
[1930-1940] +2.21 %/yr
[1940-1950] +5.04 %/yr
[1950-1960] +3.52 %/yr
[1960-1970] +1.85 %/yr
[1970-1980] +2.28 %/yr
[1980-1990] +1.11 %/yr
[1990-2000] +1.16 %/yr
[2000-2005] +0.95 %/yr
[2005-2010] +0.92 %/yr
[2010-2014] +0.06 %/yr
Looking for settlements in Napa County? Visit this page: Settlements in Napa County, CA
Population of Napa County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 3895 | 3769 | 7,664 |
| 5 to 9 | 4431 | 4143 | 8,574 |
| 10 to 14 | 4500 | 4508 | 9,008 |
| 15 to 19 | 4736 | 4499 | 9,235 |
| 20 to 24 | 4837 | 4429 | 9,266 |
| 25 to 29 | 4516 | 4146 | 8,662 |
| 30 to 34 | 4555 | 4400 | 8,955 |
| 35 to 39 | 4425 | 4265 | 8,690 |
| 40 to 44 | 4629 | 4628 | 9,257 |
| 45 to 49 | 4784 | 4721 | 9,505 |
| 50 to 54 | 5081 | 4994 | 10,075 |
| 55 to 59 | 4855 | 4934 | 9,789 |
| 60 to 64 | 4354 | 4811 | 9,165 |
| 65 to 69 | 3788 | 3968 | 7,756 |
| 70 to 74 | 2598 | 2988 | 5,586 |
| 75 to 79 | 1829 | 2151 | 3,980 |
| 80 to 84 | 1331 | 1592 | 2,923 |
| 85+ | 1245 | 2332 | 3,577 |
Napa 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 | 61700 | 62289 | 123,989 |
| WA | 59742 | 60338 | 120,080 |
| NH | 45708 | 48251 | 93,959 |
| NHWAC | 38411 | 40586 | 78,997 |
| NHWA | 36998 | 39146 | 76,144 |
| H | 24681 | 23027 | 47,708 |
| HWAC | 23289 | 21703 | 44,992 |
| HWA | 22744 | 21192 | 43,936 |
| AAC | 6471 | 7109 | 13,580 |
| NHAAC | 5964 | 6650 | 12,614 |
| AA | 5411 | 6092 | 11,503 |
| NHAA | 5100 | 5813 | 10,913 |
| TOM | 2255 | 2219 | 4,474 |
| BAC | 2363 | 2043 | 4,406 |
| NHBAC | 1938 | 1620 | 3,558 |
| IAC | 1718 | 1642 | 3,360 |
| BA | 1832 | 1499 | 3,331 |
| NHTOM | 1620 | 1628 | 3,248 |
| NHBA | 1558 | 1213 | 2,771 |
| HIAC | 965 | 900 | 1,865 |
| IA | 905 | 846 | 1,751 |
| NHIAC | 753 | 742 | 1,495 |
| HTOM | 635 | 591 | 1,226 |
| HIA | 626 | 585 | 1,211 |
| NAC | 496 | 515 | 1,011 |
| HAAC | 507 | 459 | 966 |
| HBAC | 425 | 423 | 848 |
| NHNAC | 345 | 366 | 711 |
| HAA | 311 | 279 | 590 |
| HBA | 274 | 286 | 560 |
| NHIA | 279 | 261 | 540 |
| NA | 244 | 284 | 528 |
| NHNA | 153 | 190 | 343 |
| HNAC | 151 | 149 | 300 |
| HNA | 91 | 94 | 185 |
• Alameda County population
63.4 mi, 
159°
• Sacramento County
53.4 mi, 
94°
• Contra Costa County
45.4 mi, 
153°
• Sonoma County
32.5 mi, 
272°
• Solano County
26.7 mi, 
128°
• Marin County
38.8 mi, 
215°
• Yolo County
25.8 mi, 
62°
• Sutter County
49.6 mi, 
42°
• Lake County
46.5 mi, 
330°
• Colusa County
46.6 mi, 
5°
[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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