Kauai County Demographics

A map of Kauai County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
Asian	22,131	20,504	30.0%	28.0%
White	21,155	22,194	28.7%	30.3%
Multiracial	14,705	15,590	19.9%	21.3%
Hispanic	7,804	7,394	10.6%	10.1%
Native American/Other	7,360	7,264	10.0%	9.9%
Black	576	352	0.8%	0.5%

Kauai County, Hawaii has an estimated population of 73,731, a less than 1% change from the 73,298 recorded in the 2020 Census. The population is 30.0% Asian, 28.7% White, 19.9% Multiracial, 10.6% Hispanic, 10.0% Native American/Other, and 0.8% Black. This demographic dot map shows the population of Kauai County, with one dot drawn for each person counted by the Census, color-coded by race.

Kauai is about as racially diverse as it was in the 2020 Census. It is slightly more diverse than Hawaii overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Kauai County, that probability was 76.5% in 2020 and 76.7% in the most recent ACS estimates.

Kauai County is ranked the 4th most populous county in Hawaii, out of 5 counties. Kauai County was ranked the 4th most populous county in the 2020 Census.

Kauai County's White Population

21,155 residents of Kauai County, or 28.7% of the population, identify as White. The share of White residents in Kauai County is higher than in Hawaii overall, where 20.9% of the population is White. Kauai County ranks 4th statewide in terms of White residents as a share of the population, out of 5 counties.

Since the 2020 Census, Kauai County's White population has declined by an estimated 4.7%. White residents' share of Kauai County's population has decreased from 30.3% to 28.7%.

Kauai County is more White than neighboring Kalawao County (19.4% White), Honolulu County (17.2% White), and Aleutians East County (16.9% White). Kauai County is less White than neighboring Maui County (29% White), and Hawaii County (29.9% White).

Kauai County's Black Population

576 residents of Kauai County, or 0.8% of the population, identify as Black. The share of Black residents in Kauai County is comparable to the share in Hawaii overall, where 1.8% of the population is Black. Kauai County ranks 4th statewide in terms of Black residents as a share of the population, out of 5 counties.

Since the 2020 Census, Kauai County's Black population has grown by an estimated 63.6%. Black residents' share of Kauai County's population has remained roughly unchanged at 0.8%.

Kauai County is more Black than neighboring Kalawao County (0% Black). Kauai County is less Black than neighboring Honolulu County (2.2% Black), and Aleutians East County (3% Black).

Kauai County's Asian Population

22,131 residents of Kauai County, or 30.0% of the population, identify as Asian. The share of Asian residents in Kauai County is lower than in Hawaii overall, where 36.4% of the population is Asian. Kauai County ranks 2nd statewide in terms of Asian residents as a share of the population, out of 5 counties.

Since the 2020 Census, Kauai County's Asian population has grown by an estimated 7.9%. Asian residents' share of Kauai County's population has increased from 28.0% to 30.0%.

Kauai County is more Asian than neighboring Kalawao County (17.9% Asian), Maui County (27.7% Asian), Hawaii County (20.2% Asian), and Aleutians East County (19% Asian). Kauai County is less Asian than neighboring Honolulu County (41.6% Asian).

Kauai County's Hispanic Population

7,804 residents of Kauai County, or 10.6% of the population, identify as Hispanic. The share of Hispanic residents in Kauai County is comparable to the share in Hawaii overall, where 9.9% of the population is Hispanic. Kauai County ranks 4th statewide in terms of Hispanic residents as a share of the population, out of 5 counties.

Since the 2020 Census, Kauai County's Hispanic population has grown by an estimated 5.5%. Hispanic residents' share of Kauai County's population has increased from 10.1% to 10.6%.

Kauai County is more Hispanic than neighboring Honolulu County (9.4% Hispanic), and Aleutians East County (8.7% Hispanic). Kauai County is less Hispanic than neighboring Kalawao County (13.4% Hispanic), and Hawaii County (11.7% Hispanic).

Kauai County's Native American/Other Population

7,360 residents of Kauai County, or 10.0% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Kauai County is comparable to the share in Hawaii overall, where 10% of the population is Native American/Other. Kauai County ranks 5th statewide in terms of Native American/Other residents as a share of the population, out of 5 counties.

Since the 2020 Census, Kauai County's Native American/Other population has grown by an estimated 1.3%. Native American/Other residents' share of Kauai County's population has remained roughly unchanged at 10.0%.

Kauai County is more Native American/Other than neighboring Honolulu County (9.5% Native American/Other). Kauai County is less Native American/Other than neighboring Kalawao County (32.8% Native American/Other), Maui County (10.1% Native American/Other), Hawaii County (12.5% Native American/Other), and Aleutians East County (41.3% Native American/Other).

Kauai County's Multiracial Population

14,705 residents of Kauai County, or 19.9% of the population, identify as Multiracial. The share of Multiracial residents in Kauai County is comparable to the share in Hawaii overall, where 21% of the population is Multiracial. Kauai County ranks 2nd statewide in terms of Multiracial residents as a share of the population, out of 5 counties.

Since the 2020 Census, Kauai County's Multiracial population has declined by an estimated 5.7%. Multiracial residents' share of Kauai County's population has decreased from 21.3% to 19.9%.

Kauai County is more Multiracial than neighboring Kalawao County (16.4% Multiracial), and Aleutians East County (11.1% Multiracial). Kauai County is less Multiracial than neighboring Maui County (21.7% Multiracial), Hawaii County (24.9% Multiracial), and Honolulu County (20.1% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.