
Kentucky · FIPS 21121
Knox ZIP codes — Knox County, Kentucky
Quick answer
Knox County is home to 30,034 residents with a median household income of $33,153 and a median home value of $109,200. 65.6% of households own their home and 36.7% of residents live below the poverty line. Looking for a Knox ZIP code? 15 ZIP code areas fall inside Knox County, Kentucky, listed in full below.
- Population
- 30,034Knox County residents
- Median household income
- $33,153Past 12 months, inflation adjusted
- Median home value
- $109,200Owner-occupied units
- Median gross rent
- $631Rent plus utilities, monthly
- Median age
- 39.8 yrsAll residents
- Homeownership rate
- 65.6%Owner-occupied households
Knox County, KY in context
How this area compares with national benchmarks.
Knox County is a small city in Kentucky, with 30,034 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates. The median age here is 39.8 years against 39.1 nationally, a slightly older profile than the country as a whole. Places under 65,000 residents only appear in the five-year release, never the one-year file, so these values pool sixty months of responses and lag the current year by design.
Households in Knox County earn a median of $33,153 a year, 57.8% below the national figure of $78,538. This figure covers the household, not the worker: two people on ordinary wages at one address outrank a single professional in the same table. Poverty reaches 36.7% of residents here, well above the 12.4% national rate, which is the single clearest signal in this dataset that median income here is carried by a narrow band of households.
The typical owner-occupied home in Knox County is valued at $109,200, 64% below the national figure, while median gross rent runs $631 a month, 55.1% below the national figure, or roughly $7,572 across a full year. A household on the local median income would put about 22.8% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is within the standard affordability guideline. The home-price-to-income ratio works out to 3.3×, against roughly 3.9× nationally, so buying is easier here than in the average US market. 65.6% of occupied homes are owner-occupied versus 65% nationally, so the market leans toward owners. Gross rent folds in the utilities a tenant pays separately, so it is closer to the real monthly outlay than a headline rent figure.
All values below were released by the Census for this exact geography, with no gap-filling on our side. Small-area estimates still carry wider margins of error than state or national figures, so check the linked ACS tables before relying on them for lending, appraisal or legal work.
ZIP codes in Knox County
ZIP code tabulation areas whose land area falls mostly in Knox County.
How to read this page
What these estimates cover.
Figures are five-year rolling averages from the American Community Survey, not single-year counts, so they describe conditions across 2019-2023 ACS 5-year rather than a single date. Median home value covers owner-occupied units as valued by their owners, and median gross rent includes utilities the renter pays. Small counties carry wide margins of error; treat single-dollar differences between neighbouring counties as noise.
Source: US Census Bureau, ACS 2019-2023 5-year estimates · rates as published for 2019-2023 ACS 5-year
Cities and towns in Kentucky
Largest Census places in Kentucky by population.
- Louisville/Jefferson County metro government (balance) 627,210
- Lexington-Fayette urban county 321,122
- Bowling Green city 73,638
- Owensboro city 60,112
- Covington city 40,902
- Georgetown city 38,206
- Richmond city 35,498
- Florence city 32,334
- Elizabethtown city 31,870
- Nicholasville city 31,625
- Hopkinsville city 31,011
- Independence city 29,024
Nearby counties
Other counties in Kentucky.
Frequently asked questions
Common questions about this area.
- What is the population of Knox County?
- Knox County has 30,034 residents on Census ACS 2019-2023 ACS 5-year estimates.
- What is the median household income in Knox County?
- Median household income in Knox County is $33,153 a year, 57.8% below the national figure of $78,538.
- How much does it cost to rent or buy in Knox County?
- Median gross rent is $631 a month and the median home value is $109,200, so rent absorbs about 22.8% of median household income.
- Is Knox County affordable compared with the rest of the US?
- Homes cost about 3.3× the local median income here versus roughly 3.9× nationally, so Knox County is more affordable to buy in than the typical US market, and rent takes 22.8% of median income against the 30% cost-burden line.
- How current is this Knox County data?
- All figures come from the US Census Bureau American Community Survey 2019-2023 ACS 5-year five-year estimates. Places under 65,000 residents only appear in the five-year release, never the one-year file, so these values pool sixty months of responses and lag the current year by design.