Knox County · Kentucky
ZIP code 40921
- Population
- 129
- Median income
- —
- Median home
- $45,800
- Sales tax
- 6%
ZCTA residents
Household, past 12 months
Owner-occupied value
Kentucky state rate
Quick answer
ZIP 40921 sits in Knox County, Kentucky and is home to 129 people. Median household income is —, the median home is worth $45,800 and median gross rent is —. 55.3% of households own their home, and purchases are taxed at 6% (Kentucky state rate).
- County
- Knox County
- State
- Kentucky (KY)
- Area codes
- Not published
- Metro area
- Outside covered metros
FIPS 21121
779 ZIPs covered
No NANPA match for this ZIP
Rate jurisdiction used for tax
The numbers for 40921
American Community Survey 2019-2023 ACS 5-year estimates for this ZCTA.
- Population
- 129ZIP 40921 residents
- Median household income
- —Past 12 months, inflation adjusted
- Median home value
- $45,800Owner-occupied units
- Median gross rent
- —Rent plus utilities, monthly
- Median age
- 25.7 yrsAll residents
- Homeownership rate
- 55.3%Owner-occupied households
Sales tax in 40921
What a purchase inside this ZIP costs at checkout.
Kentucky levies 6% statewide with no local add-ons. Check the county page for the local component before you quote a price.
Affordability in this ZIP
Derived from the Census medians above — indicative, not an offer.
A rent burden above 30% is the federal threshold for cost-burdened households, and a price-to-income multiple above 4× is generally considered a stretched housing market. The mortgage figure is principal and interest only — taxes, insurance and HOA dues are extra.
How 40921 compares
ZIP 40921 against the median ZIP in Knox County and across Kentucky.
| Measure | ZIP 40921 | County median | State median | vs state |
|---|---|---|---|---|
| Median household income | — | $43,472 | $53,906 | — |
| Median home value | $45,800 | $82,400 | $130,850 | -65% |
| Median gross rent | — | $667 | $791 | — |
| Population | 129 | 675 | 1,457 | -91% |
Medians are computed across the 15 ZIP areas in Knox County and the 779 ZIP areas in Kentucky.
Statewide rank
Where this ZIP places among all 779 Kentucky ZIP areas.
- Income
- —
- Home value
- #636
- Population
- #712
Not published
above 3% of 654 state ZIPs
larger than 9% of 779 state ZIPs
Nearby ZIP codes
Other ZIP codes filed under Knox County.
ZIP 40921 questions
Common questions about this ZIP code.
- Where is ZIP code 40921?
- ZIP 40921 lies mostly in Knox County, Kentucky. County assignment follows the largest share of land area, so a ZIP straddling a county line is filed under its dominant county.
- What sales tax do I pay in 40921?
- Kentucky charges 6% statewide.
- Is 40921 expensive to live in?
- Median rent runs — a month, and the median home is worth $45,800 — -65% against the typical Kentucky ZIP.
- Is a ZCTA the same as a postal ZIP code?
- Not exactly. The Census builds ZIP Code Tabulation Areas from the ZIP codes of addresses inside each census block, so a ZCTA can differ slightly from the USPS delivery route of the same number, and PO-box-only ZIPs have no ZCTA at all.
Keep going
Related pages for this area.
Sources & transparency
- US Census Bureau, ACS 2019-2023 5-year estimates — 2019-2023 ACS 5-year — population, income, housing
- Census 2020 ZCTA-to-county relationship file — County assignment by largest land-area overlap
- Kentucky Department of Revenue — Sales tax rates and local add-ons
Last reviewed December 2024. Figures are published for reference and can change; verify with the source agency before filing or contracting. How we build and check this data.