Health care · County · Maine
Optometrists and eye clinics in Knox County, ME
How Knox County, ME compares with other counties and the U.S. for optometrists and eye clinics: competitors, household spending, official counts and growth.
Groundwork market score · out of 100
Score 28 out of 100: Lower middle
Ranked #1,111 of 1,302 scored counties
#10 of 11 scored counties in Maine
- Listings
- 10
- 0 chain locations (0%)
- Official establishments
- 5
- Businesses with payroll, 2023
- Household spending a year
- $21.6M
- On medical and dental services · $1,171 a household
- Spending per listing
- $2.2M
- 31% below the U.S.
- Listings per 10k households
- 5.4
- 32% above the U.S.
- Population, 2025
- 41,117
- +1.1% since 2020
See the optometrists and eye clinics around any address in Knox County
The site report maps the optometrists and eye clinics 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 Knox 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
Knox County scores 28 (lower middle) on the Groundwork market score for optometrists and eye clinics, ranking #1,111 of 1,302 scored counties and #10 of 11 scored counties in Maine. That puts it in the bottom quarter of counties.
As of September 2026, map listings count 10 optometrists and eye clinics in Knox County. None of them are chain locations, against 20% across the U.S. That comes to 5.4 for every 10,000 households, 32% above the U.S. rate of 4.1.
Households in Knox County spend about $21.6M a year on medical and dental services, or $1,171 per household, 9% below the U.S. average. That is about $2.2M of household spending for each practice on map listings, 31% below the U.S. figure of $3.1M. That spending covers all medical and dental services, which optometrists and eye clinics share with other businesses in the trade.
Official counts show 5 businesses with payroll classed as offices of optometrists in Knox County in 2023. That is one for every 3,697 households, against one for every 5,742 across the U.S. Population estimates put the population change in Knox County from 2020 to 2025 at +1.1%, slower than the U.S. (+3.1%).
How Knox County compares
The same measures for Maine and the whole U.S. Spending per listing divides a year of household spending on all medical and dental services by the optometrists and eye clinics 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 | Knox County | Maine | U.S. |
|---|---|---|---|
| Listings per 10k households | 5.4 | 3.7 | 4.1 |
| Spending per listing | $2.2M | $3.2M | $3.1M |
| Households per official establishment | 3,697 | 5,380 | 5,742 |
| Official establishment growth, 2019–2023 | n/a | +5.7% | +0.2% |
| Population growth, 2020–2025 | +1.1% | +3.7% | +3.1% |
| Spending per household on medical and dental services | $1,171 | $1,163 | $1,288 |
| Median household income | $74,096 | $74,733 | $80,734 |
| Groundwork market score | 28 | 46 |
Official counts and lending
Businesses
- Official establishments, 2019 to 2023
- 5 → 5
- Employees, 2023
- 20
- Annual payroll, 2023
- $1.1M
- One-person businesses, 2023
- Not publishedNot published for this business type
- Map listings, September 2026
- 100 chain locations
- Listings at the U.S. rate for this spending
- 7The 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 offices of optometrists in Knox 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 Knox County
- Population, 2025 estimate
- 41,117+1.1% since 2020
- Households
- 18,484
- Median age
- 49.3
- Homes lived in by their owners
- 79%
- Vehicles per household
- 1.8
- Land area
- 365 sq. mi.
- People per square mile
- 112
- Median household income
- $74,096+28.3% vs. 2015–2019, before inflation
- Average household income
- $99,101
- Median home value
- $324,900
- Jobs located here
- 16,342
- Daytime population
- 41,779Residents who don’t work, plus everyone whose job is here
Looking at a specific site in Knox 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 optometrists and eye clinics on map listings by name and distance.
Or open the report at the center of Knox County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardOptometrists and eye care across Maine
Every Maine market ranked →The highest-scoring counties in Maine for optometrists and eye clinics, numbered among those based in Maine, with Knox County marked.
Top counties in Maine
| Market | Score | Listings | Per 10k households | Spending per listing | Population growth | U.S. rank |
|---|---|---|---|---|---|---|
| 1York County, ME | 72 | 27 | 3.0 | $4.2M | +4.8% | #164 of 1,302 |
| 2Oxford County, ME | 63 | 6 | 2.5 | $4.3M | +4.2% | #340 of 1,302 |
| 3Kennebec County, ME | 56 | 18 | 3.3 | $3.3M | +3.5% | #519 of 1,302 |
| 4Androscoggin County, ME | 56 | 16 | 3.4 | $3.2M | +4.8% | #523 of 1,302 |
| 5Cumberland County, ME | 52 | 60 | 4.5 | $2.9M | +4.5% | #642 of 1,302 |
| 6Hancock County, ME | 48 | 9 | 3.5 | $3.2M | +3.0% | #728 of 1,302 |
| 7Waldo County, ME | 43 | 7 | 4.0 | $2.8M | +2.6% | #840 of 1,302 |
| 8Lincoln County, ME | 42 | 8 | 4.8 | $2.4M | +3.8% | #873 of 1,302 |
| 9Penobscot County, ME | 40 | 30 | 4.6 | $2.4M | +3.8% | #917 of 1,302 |
| 10Knox County, ME | 28 | 10 | 5.4 | $2.2M | +1.1% | #1,111 of 1,302 |
Other business types in Knox County
Each with its Groundwork market score here, out of 100, where it has one.
Food and drink
Groceries and convenience
Auto
Beauty and personal care
Fitness and classes
Health care
- Doctors, dentists and clinics29
- Dentists and orthodontists26
- Primary care and pediatrics53
- Urgent care and walk-in clinics
- Chiropractors41
- Physical therapy44
- Optometrists and eye care28
Child care
Clothing and laundry
Home services
Real estate
Funeral services
Questions
How many optometrists and eye clinics are in Knox County, ME?
Knox County has 10 optometrists and eye clinics on map listings as of September 2026. None of them are chain locations. The listings count optometrists and eye clinics. Official counts show 5 businesses with payroll classed as offices of optometrists in 2023.
How much do households in Knox County, ME spend on medical and dental services?
About $21.6M a year, or $1,171 per household. That is 9% below the U.S. average (an index of 91, where 100 is the U.S. average). Spread across the 10 optometrists and eye clinics on map listings, it comes to $2.2M per practice. The spending figure covers all medical and dental services, not only optometrists and eye clinics. It is estimated from the incomes of the 18,484 households in Knox County and national spending patterns by income.
How does Knox County, ME compare with the U.S. for optometrists and eye clinics?
Knox County has 5.4 optometrists and eye clinics per 10,000 households, 32% above the U.S. rate of 4.1. Spending per practice is $2.2M, 31% below the U.S. figure of $3.1M. At the national ratio of optometrists and eye clinics to household spending, Knox County would have about 7, against 10 on map listings. There is one business with payroll in the industry for every 3,697 households, against one for every 5,742 across the U.S.
How fast is Knox County, ME growing?
Population estimates put Knox County at 41,117 people in 2025, up 1.1% since 2020, slower than the U.S. (+3.1%). It has 18,484 households. The median household income in Knox County is $74,096 a year, 8% below the U.S. median of $80,734. That rose 28.3% 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. Knox County scores 28 for optometrists and eye clinics (lower middle), #1,111 of 1,302 scored counties.
How can I see the market around a specific site?
Run a Groundwork site report on an address in Knox County. It maps the optometrists and eye clinics 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 optometrists and eye clinics · All 56 business types in Knox County
Screening a site or an acquisition in Knox 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 Knox 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.