Why are some ZIP codes missing?

ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

Oldest ZIP codes in Louisville/Jefferson County metro government (balance), KY

These are the 22 ZIP codes in Louisville/Jefferson County metro government (balance), KY with the highest median age, out of 22 with at least 1,000 residents. 40059 (Prospect, 47.2), 40023 (Fisherville, 44.6) and 40223 (Louisville, 43.1) lead the list. There is no single "best" ZIP code in Louisville/Jefferson County metro government (balance); the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Oldest ZIP codes in Louisville/Jefferson County metro government (balance)

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	40059	Prospect	47.2 ±1.5	20,892	8,250	9,323
2	40023	Fisherville	44.6 ±4.3	6,870	2,489	2,716
3	40223	Louisville	43.1 ±2.2	22,798	9,971	11,261
4	40241	Louisville	42.1 ±1.8	30,696	13,288	14,672
5	40207	Louisville	41.2 ±1.3	28,903	13,759	14,842
6	40245	Louisville	40.8 ±1.8	39,835	15,048	—
7	40258	Louisville	40.7 ±2.2	26,841	10,684	11,386
8	40228	Louisville	40.5 ±3.5	18,085	7,279	8,542
9	40299	Louisville	40.0 ±2.0	42,207	17,163	19,657
10	40222	Louisville	39.6 ±2.6	21,470	10,047	11,627
11	40220	Louisville	39.3 ±2.3	35,078	15,591	15,976
12	40291	Louisville	39.1 ±2.0	41,222	16,591	—
13	40211	Louisville	39.1 ±4.0	20,407	8,781	9,572
14	40213	Louisville	39.0 ±2.9	16,054	7,320	7,579
15	40216	Louisville	38.9 ±2.4	44,047	17,342	19,299
16	40272	Louisville	38.2 ±1.3	38,289	14,313	16,196
17	40242	Louisville	37.5 ±2.7	11,168	5,010	4,906
18	40118	Fairdale	37.1 ±2.2	10,697	4,244	4,662
19	40229	Louisville	36.2 ±1.5	41,299	15,630	17,185
20	40214	Louisville	35.4 ±1.6	45,405	18,443	19,980
21	40219	Louisville	35.1 ±1.9	39,909	16,186	17,521
22	40218	Louisville	33.2 ±1.2	33,736	13,474	14,126

How we ranked them

Ranked by median age of all residents, highest first (ACS 5-year estimates, 2020–2024). ZIP codes need at least 1,000 residents to be ranked; 22 of 23 qualify.

Which of these to mail, and why

Older ZIP codes respond to health care, hearing and vision, Medicare plans, home safety, estate planning and services that come to the door.

The top five ZIP codes on this list hold 47,757 households, on 104 carrier routes with 52,814 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 40059 on the EDDM route map

More rankings

Businesses that mail these ZIP codes

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EDDM guides

Frequently asked questions

Which ZIP code in Louisville/Jefferson County metro government (balance) has the highest median age?: 40059 (Prospect), at 47.2 (±1.5), among 22 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by median age of all residents, highest first (ACS 5-year estimates, 2020–2024).
Why are some ZIP codes missing?: ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.