Last official estimated population of Kauai County was 67,217 (year 2014)[1]. This was 0.021% of total US population and 4.7% of total Hawaii state population. Area of Kauai County is 1,266.3 mi² (=3279.8 km²), in this year population density was 53.08 p/mi². If population growth rate would be same as in period 2010-2014 (+0.05%/yr), Kauai County population in 2024 would be 67,533 [0].
Historical population of Kauai County for period 1900-2014 [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
[1900-1910] +1.45 %/yr
[1910-1920] +2.08 %/yr
[1920-1930] +2.02 %/yr
[1930-1940] -0.03 %/yr
[1940-1950] -1.79 %/yr
[1950-1960] -0.59 %/yr
[1960-1970] +0.55 %/yr
[1970-1980] +2.76 %/yr
[1980-1990] +2.73 %/yr
[1990-2000] +1.34 %/yr
[2000-2005] +1.46 %/yr
[2005-2010] +1.31 %/yr
[2010-2014] +0.05 %/yr
Looking for settlements in Kauai County? Visit this page: Settlements in Kauai County, HI
Population of Kauai County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 2301 | 2188 | 4,489 |
| 5 to 9 | 2306 | 2129 | 4,435 |
| 10 to 14 | 2228 | 2075 | 4,303 |
| 15 to 19 | 1993 | 1925 | 3,918 |
| 20 to 24 | 1982 | 1852 | 3,834 |
| 25 to 29 | 2256 | 2040 | 4,296 |
| 30 to 34 | 2379 | 2234 | 4,613 |
| 35 to 39 | 2186 | 2037 | 4,223 |
| 40 to 44 | 2147 | 2132 | 4,279 |
| 45 to 49 | 2170 | 2161 | 4,331 |
| 50 to 54 | 2460 | 2484 | 4,944 |
| 55 to 59 | 2558 | 2689 | 5,247 |
| 60 to 64 | 2669 | 2615 | 5,284 |
| 65 to 69 | 2217 | 2144 | 4,361 |
| 70 to 74 | 1399 | 1472 | 2,871 |
| 75 to 79 | 798 | 1004 | 1,802 |
| 80 to 84 | 554 | 829 | 1,383 |
| 85+ | 696 | 1166 | 1,862 |
Kauai 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 | 31486 | 31405 | 62,891 |
| WAC | 18648 | 17855 | 36,503 |
| AAC | 17442 | 18365 | 35,807 |
| NHAAC | 15695 | 16595 | 32,290 |
| NHWAC | 16121 | 15445 | 31,566 |
| WA | 12189 | 11572 | 23,761 |
| AA | 10495 | 11562 | 22,057 |
| NHWA | 10889 | 10339 | 21,228 |
| NHAA | 10021 | 11043 | 21,064 |
| NAC | 9266 | 8855 | 18,121 |
| TOM | 8788 | 8551 | 17,339 |
| NHNAC | 7877 | 7498 | 15,375 |
| NHTOM | 7127 | 6921 | 14,048 |
| H | 3813 | 3771 | 7,584 |
| NA | 3332 | 3060 | 6,392 |
| NHNA | 3074 | 2799 | 5,873 |
| HWAC | 2527 | 2410 | 4,937 |
| HAAC | 1747 | 1770 | 3,517 |
| HTOM | 1661 | 1630 | 3,291 |
| HNAC | 1389 | 1357 | 2,746 |
| HWA | 1300 | 1233 | 2,533 |
| IAC | 1005 | 972 | 1,977 |
| BAC | 711 | 612 | 1,323 |
| NHIAC | 663 | 641 | 1,304 |
| NHBAC | 565 | 456 | 1,021 |
| HAA | 474 | 519 | 993 |
| HIAC | 342 | 331 | 673 |
| BA | 296 | 232 | 528 |
| HNA | 258 | 261 | 519 |
| NHBA | 277 | 203 | 480 |
| IA | 199 | 199 | 398 |
| HBAC | 146 | 156 | 302 |
| HIA | 101 | 99 | 200 |
| NHIA | 98 | 100 | 198 |
| HBA | 19 | 29 | 48 |
• Honolulu County population
103.7 mi, 
111°
• San Francisco County
2429.8 mi, 
63°
• Sonoma County
2450.9 mi, 62°
• Hawaii County
318.6 mi, 
121°
• Maui County
215 mi, 111°
• Humboldt County
2449.4 mi, 58°
• Mendocino County
2443.7 mi, 60°
• Aleutians West Census Area
2377.1 mi, 
330°
• Aleutians East Borough
2299.1 mi, 
357°
• Kalawao County
183.8 mi, 107°
[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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