How many people live in ?

Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 73,800 people living in Kauai County, HI. That makes Kauai County the fourth-most populous county in Hawaii. It is home to 5.2% of people living in the state.

73.8K

population of Kauai County, HI (2024)

5.2%

County share of the Hawaii population (2024)

About 73,800 people lived in Kauai County, HI in 2024.

Population estimates, 2000–2024

What are Kauai County, HI’s age demographics?

About 17,400 Kauai County residents are aged 65 and older in 2024. That represents 23.6% of its population. For comparison, the age group represents 22.1% of Hawaii’s population and 18% in the US overall.
Another 15,400 Kauai County residents, or 20.8% of the population, were children under 18. For comparison, the age group represents 20.9% of Hawaii’s population and 21.6% in the US overall.

A higher share of Kauai County, HI's population is aged 65 or older than the US as a whole.

Population estimates by age group, (2024)

What are Kauai County, HI’s racial and ethnic demographics?

Non-Hispanic Asian residents make up 29% of the Kauai County, HI population, higher than the national share of 6.5%. Kauai County, HI also has a larger share of people identifying as non-Hispanic two or more races (21.9%) than the US overall (2.5%).
In contrast, Kauai County’s non-Hispanic white population accounts for 28.7%, below the 57.5% nationwide, and the non-Hispanic Black or African American population makes up 0.7% of the county, compared with 12.6% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.

Kauai County, HI has a higher share of a non-Hispanic white population than Hawaii as a whole.

Population estimates by race and ethnicity, (2024)

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Methodology

USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.

The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.

Page sources

USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.