ZIP code 40121

ZIP 40121 is a mid-size town in Hardin County, Kentucky, with 8,715 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #140 of 779 ranked by population — larger than 82% of them. The median age here is 24.3 years against 39.1 nationally, a distinctly younger profile, typical of places with students, military posts or a fast-growing family population. 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 ZIP 40121 earn a median of $74,224 a year, 5.5% below the national figure of $78,538. Household income here is measured before tax and pooled across everyone at the address, which is why it reads higher than typical individual earnings in the same area. Poverty reaches 8% of residents here, below the 12.4% national rate.

The typical owner-occupied home in ZIP 40121 is valued at not published, while median gross rent runs $1,234 a month, 12.2% below the national figure, or roughly $14,808 across a full year. A household on the local median income would put about 20% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is within the standard affordability guideline. 0.7% of occupied homes are owner-occupied versus 65% nationally, a renter-majority market, so rent figures matter more here than the home-value line. The rent line includes utilities paid by the tenant, a definition worth remembering when comparing it against a landlord's quoted rate.

A median age of 24.3 means a large student or early-career population; income medians in places like this understate household resources, since many residents are supported from outside the address.

The Census withheld home value for ZIP 40121 because the sample was too thin to publish at this geography. Those values were suppressed at the source, not lost in our dataset, and we do not model a replacement. Everything else on this page comes straight from the ACS 2019-2023 ACS 5-year tables.

ZIP 40121 is tabulated inside Hardin County, Kentucky, one of 10 ZIP areas the Census publishes for that county and 779 across Kentucky. Population sits in the small-town band, typically one main street plus the addresses that feed into it. County assignment on this page follows the largest share of the ZIP's land area, which matters where a delivery route crosses a county line: mail addressed to 40121 can be handled by a post office in a neighbouring county even though the tabulation area is filed here.

Against its own county, 40121 reports a median household income of $74,224, 15% above the $64,806 county median, and 38% above the $53,906 typical KY ZIP. Owner-occupied homes are valued at a median of not published. Rent is reported gross — the contract amount plus tenant-paid utilities — at $1,234 a month, which is why it reads higher than the advertised rent on a listing for the same unit.

Kentucky charges 6% statewide, and no local sales tax is layered on top, so the state rate is the full amount collected in 40121.

Everything above comes from the Census Bureau American Community Survey 2019-2023 ACS 5-year estimates for this ZIP Code Tabulation Area, with sales tax rates traced to the state revenue agency. Five-year estimates pool sixty months of responses, so they are stable enough to compare 40121 with its neighbours but always trail the current year, and any value the Census suppressed for sample size is shown as unpublished rather than filled in with a model.