Auto · County · Hawaii
Car washes and detailers in Kauai County, HI
The car washes and detailers in Kauai County, HI, the household spending behind them and how the market ranks against other counties.
Groundwork market score · out of 100
Score 64 out of 100: Upper middle
Ranked #356 of 1,451 scored counties
#3 of 4 scored counties in Hawaii
- Listings
- 9
- 0 chain locations (0%)
- Official establishments
- 5
- Businesses with payroll, 2023
- Household spending a year
- $30.6M
- On vehicle maintenance and repairs · $1,294 a household
- Spending per listing
- $3.4M
- 35% above the U.S.
- Listings per 10k households
- 3.8
- In line with the U.S.
- Population, 2025
- 73,400
- +0.3% since 2020
See the car washes and detailers around any address in Kauai County
The site report maps the car washes and detailers on map listings near the address, by name and distance, and sizes the households and spending around it. Or open the report at the center of Kauai County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardSurvey estimates 2020–2024 · population estimates 2025 · official business counts 2023 · map listings September 2026 · Data credits · How we measure
What this means
Household spending on vehicle maintenance and repairs in Kauai County comes to about $30.6M a year: $1,294 per household, 35% above the U.S. average. That is about $3.4M of household spending for each location on map listings, 35% above the U.S. figure of $2.5M. The spending figure covers all vehicle maintenance and repairs, not only car washes and detailers.
There are 9 car washes and detailers on map listings in Kauai County as of September 2026. None of them are chain locations, against 23% across the U.S. That comes to 3.8 for every 10,000 households, in line with the U.S. rate of 3.8.
In 2023, official counts showed 5 businesses with payroll in Kauai County classed as car washes. That is one for every 4,726 households, against one for every 6,523 across the U.S.
Between 2020 and 2025, the population of Kauai County grew 0.3%, slower than the U.S. (+3.1%). For car washes and detailers, Kauai County has a Groundwork market score of 64 (upper middle): #356 of 1,451 scored counties and #3 of 4 scored counties in Hawaii. That puts it in the top quarter of counties.
How Kauai County compares
The same measures for Hawaii and the whole U.S. Spending per listing divides a year of household spending on all vehicle maintenance and repairs by the car washes and detailers counted, so it measures the demand for each competitor, not any business’s revenue. Households per establishment does the same with the official count.
| Measure | Kauai County | Hawaii | U.S. |
|---|---|---|---|
| Listings per 10k households | 3.8 | 3.2 | 3.8 |
| Spending per listing | $3.4M | $3.4M | $2.5M |
| Households per official establishment | 4,726 | 8,208 | 6,523 |
| Official establishment growth, 2019–2023 | n/a | +42.9% | +16.7% |
| Population growth, 2020–2025 | +0.3% | −1.3% | +3.1% |
| Spending per household on vehicle maintenance and repairs | $1,294 | $1,083 | $958 |
| Median household income | $97,668 | $100,389 | $80,734 |
| Groundwork market score | 64 | 69 |
Official counts and lending
Businesses
- Official establishments, 2019 to 2023
- 5
- Employees, 2023
- 5
- Annual payroll, 2023
- $198K
- One-person businesses, 2023
- Not publishedNot published for this business type
- Map listings, September 2026
- 90 chain locations
- Listings at the U.S. rate for this spending
- 12The U.S. ratio of listings to household spending, applied here
SBA-backed loans since fiscal 2022
- Loans
- 0
- Amount
- $0
SBA-backed loans to businesses classed as car washes in Kauai County, through June 2026, placed by the borrower’s ZIP code. Official establishments are businesses with payroll; the official counts leave out places with fewer than 3.
Population and households in Kauai County
- Population, 2025 estimate
- 73,400+0.3% since 2020
- Households
- 23,632
- Median age
- 43.9
- Homes lived in by their owners
- 69%
- Vehicles per household
- 2.3
- Land area
- 620 sq. mi.
- People per square mile
- 119
- Median household income
- $97,668+16.9% vs. 2015–2019, before inflation
- Average household income
- $126,466
- Median home value
- $873,200
- Jobs located here
- 28,378
- Daytime population
- 63,469Residents who don’t work, plus everyone whose job is here
Looking at a specific site in Kauai County?
These figures cover the whole county. A site report draws rings around one address and counts what’s inside them: households, spending, jobs, and the car washes and detailers on map listings by name and distance.
Or open the report at the center of Kauai County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardCar washes and detailing across Hawaii
Every Hawaii market ranked →The highest-scoring counties in Hawaii for car washes and detailers, numbered among those based in Hawaii, with Kauai County marked.
Top counties in Hawaii
| Market | Score | Listings | Per 10k households | Spending per listing | Population growth | U.S. rank |
|---|---|---|---|---|---|---|
| 1Hawaii County, HI | 86 | 24 | 3.2 | $3.5M | +4.6% | #30 of 1,451 |
| 2Honolulu County, HI | 65 | 97 | 2.9 | $3.6M | −2.3% | #334 of 1,451 |
| 3Kauai County, HI | 64 | 9 | 3.8 | $3.4M | +0.3% | #356 of 1,451 |
| 4Maui County, HI | 63 | 28 | 5.0 | $2.4M | −2.5% | #402 of 1,451 |
Other business types in Kauai County
Each with its Groundwork market score here, out of 100, where it has one.
Food and drink
Groceries and convenience
Auto
- Auto repair and car care72
- Auto repair shops70
- Collision repair and body shops73
- Car washes and detailing64
- Tire shops
- Oil change and quick lube
- Gas stations74
- Insurance agencies68
Beauty and personal care
Fitness and classes
Health care
Child care
Clothing and laundry
Home services
Real estate
Funeral services
Questions
How many car washes and detailers are in Kauai County, HI?
As of September 2026, map listings count 9 car washes and detailers in Kauai County. None of them are chain locations. The listings count car washes and detailers. Official counts show 5 businesses with payroll classed as car washes in 2023.
How much do households in Kauai County, HI spend on vehicle maintenance and repairs?
About $30.6M a year, or $1,294 per household. That is 35% above the U.S. average (an index of 135, where 100 is the U.S. average). Spread across the 9 car washes and detailers on map listings, it comes to $3.4M per location. That spending covers all vehicle maintenance and repairs, which car washes and detailers share with other businesses in the trade. It is estimated from the incomes of the 23,632 households in Kauai County and national spending patterns by income.
How does Kauai County, HI compare with the U.S. for car washes and detailers?
Kauai County has 3.8 car washes and detailers per 10,000 households, in line with the U.S. rate of 3.8. Spending per location is $3.4M, 35% above the U.S. figure of $2.5M. At the U.S. ratio of car washes and detailers to household spending, Kauai County would have about 12, against 9 on map listings. There is one business with payroll in the industry for every 4,726 households, against one for every 6,523 across the U.S.
How fast is Kauai County, HI growing?
Population estimates put Kauai County at 73,400 people in 2025, up 0.3% since 2020, slower than the U.S. (+3.1%). It has 23,632 households. The median household income in Kauai County is $97,668 a year, 21% above the U.S. median of $80,734. That rose 16.9% from the 2015–2019 survey, before inflation.
What is the Groundwork market score?
The Groundwork market score runs from 0 to 100 and compares a market with others of its kind for one business type: states with states, metro areas with metro areas, small-town markets and counties with their own. It weighs household spending per competitor (35%), households per business with payroll (25%), population growth (20%) and spending power (20%), each ranked against those peers. A higher score means that, taken together, the market has more household spending and more households for each business already there, faster population growth and more spending per household than similar markets. It describes a market, not any one site or deal. Kauai County scores 64 for car washes and detailers (upper middle), #356 of 1,451 scored counties.
How can I see the market around a specific site?
Run a Groundwork site report on an address in Kauai County. It maps the car washes and detailers on map listings near the site and sizes the households and spending within the distance you choose. New accounts get 10 actions over 3 days, no card.
How the score works · Top markets for car washes and detailers · All 56 business types in Kauai County
Screening a site or an acquisition in Kauai County?
A site report maps the competitors on map listings near an address and sizes the households and spending around it.
The button opens the report at the center of Kauai County. Signed out, you see a blurred preview; on an account, each report is one action.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Figures are estimates for research only. Not investment or real estate advice.