40221 ZIP Code Facts: What Makes This Area Stand Out

40221 ZIP code facts: 40221 is a Louisville, Kentucky ZIP code in Jefferson County, and it is primarily a PO Box ZIP tied to the Air Mail Facility rather than a broad residential neighborhood. It sits in the Eastern time zone, uses area code 502, and is centered near Louisville's airport and logistics corridor.

What 40221 covers

The 40221 ZIP code is assigned to Louisville, KY, and the available directory data shows it as a ZIP Type of PO Box with the post office city listed as Louisville. That means it functions more like a mail-processing and PO Box destination than a typical street-delivery ZIP code.

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Directory listings place it in Jefferson County and connect it with the Medical Center and Central Business District neighborhood labels, while the ZIP's geographic point is approximately 38.25, -85.75 with an estimated radius of about one mile.

Location details

The most notable operational site in Air Mail Facility data is the Air Mail Facility at 4440 Crittenden Dr, Louisville, KY 40221-9990, which is listed as the only post office in the ZIP. This strongly suggests 40221 is tied to airport-adjacent mail handling and PO Box service rather than a conventional suburban delivery zone.

Nearby ZIP codes include 40285, 40298, 40203, 40202, and 40210, which helps place 40221 in Louisville's central and airport-influenced mail network.

Postal and service facts

The postal profile for 40221 reflects a highly specialized ZIP: mail service is routed through the Air Mail Facility, and the listing includes PO Box ranges such as 40221-0001, 40221-0121, and 40221-0901. That pattern is characteristic of a ZIP built around postal routing and facility use rather than standard block-by-block residential assignments.

Because it is a Louisville ZIP in Kentucky, 40221 also sits under the state's 6.0% combined sales tax rate, which is the statewide minimum combined rate shown in the available tax lookup.

At-a-glance data

Why 40221 stands out

The airport connection is what makes 40221 especially unusual. A ZIP anchored by an Air Mail Facility often reflects logistics, sorting, and specialized mail distribution more than everyday household geography, which changes how people should interpret address and service data for the area.

It also sits in one of Louisville's most institution-heavy and transportation-heavy parts of the city, close to facilities that shape regional movement of people and freight. Even without broad residential coverage, that makes 40221 important in local commerce, shipping, and postal operations.

How to interpret it

1. Use 40221 as a mailing ZIP first, since the official listing identifies it as PO Box oriented.
2. Expect Louisville, Jefferson County, and the Eastern time zone in address lookups and forms.
3. Do not assume it maps to a normal residential neighborhood, because the primary facility is the Air Mail Facility.
4. Use nearby ZIPs like 40203 or 40210 when researching surrounding neighborhoods and street-delivery areas.
5. Apply Kentucky's 6.0% sales tax as the baseline for state-level tax estimates.

Useful bullet facts

• ZIP code: 40221.
• City: Louisville, Kentucky.
• County: Jefferson County.
• ZIP type: PO Box.
• Main post office: Air Mail Facility, 4440 Crittenden Dr.
• Timezone: Eastern.
• Area code: 502.
• Nearby ZIPs: 40285, 40298, 40203, 40202, 40210.

Historical context

Louisville's airport district has long mattered for freight and passenger movement, and ZIP codes like 40221 reflect that infrastructure-driven geography. In postal terms, a ZIP centered on an air mail facility signals operational importance: it serves the movement of letters and packages at scale, not just a compact neighborhood of homes.

This is why ZIP code geography can be misleading if you treat all ZIP codes the same. Some are community-based, while others, like 40221, exist because the postal system needs a routing and handling hub.

Common questions

"ZIP codes are not just places on a map; some are postal functions first and neighborhoods second."

The final takeaway is simple: 40221 is a Louisville ZIP code in Jefferson County that functions mainly as a PO Box and air mail processing area, with clear links to the city's airport logistics network. If you are looking up addresses, taxes, or mail routing, that specialized role is the most important fact to know.