Which ZIP code in Jefferson County has the highest share of households with children?

40023 (Fisherville), at 35.9%, among 33 ZIP codes with at least 1,000 residents.

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.

ZIP codes with the most families with kids in Jefferson County, KY

These are the 25 ZIP codes in Jefferson County with the highest share of households with children, out of 33 with at least 1,000 residents. 40023 (Fisherville, 35.9%), 40229 (Louisville, 34.2%) and 40219 (Louisville, 34.1%) lead the list. There is no single "best" ZIP code in Jefferson County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

ZIP codes with the most families with kids in Jefferson County

Rank	ZIP	Mailing city	Households with children under 18	Residents	Households	Residential mailboxes
1	40023	Fisherville	35.9%	6,870	2,489	2,716
2	40229	Louisville	34.2%	41,299	15,630	17,185
3	40219	Louisville	34.1%	39,909	16,186	17,521
4	40272	Louisville	34.1%	38,289	14,313	16,196
5	40218	Louisville	33.9%	33,736	13,474	14,126
6	40059	Prospect	32.8%	20,892	8,250	9,323
7	40215	Louisville	31.8%	20,532	8,207	9,265
8	40210	Louisville	31.1%	13,518	5,612	6,280
9	40214	Louisville	31.0%	45,405	18,443	19,980
10	40245	Louisville	30.5%	39,835	15,048	—
11	40216	Louisville	30.3%	44,047	17,342	19,299
12	40299	Louisville	28.7%	42,207	17,163	19,657
13	40211	Louisville	28.3%	20,407	8,781	9,572
14	40258	Louisville	27.9%	26,841	10,684	11,386
15	40118	Fairdale	27.5%	10,697	4,244	4,662
16	40291	Louisville	27.1%	41,222	16,591	—
17	40212	Louisville	26.5%	14,661	6,444	6,942
18	40228	Louisville	25.6%	18,085	7,279	8,542
19	40220	Louisville	24.7%	35,078	15,591	15,976
20	40241	Louisville	24.7%	30,696	13,288	14,672
21	40205	Louisville	24.2%	24,664	10,476	10,794
22	40223	Louisville	23.9%	22,798	9,971	11,261
23	40213	Louisville	23.7%	16,054	7,320	7,579
24	40242	Louisville	23.0%	11,168	5,010	4,906
25	40243	Louisville	22.5%	12,002	5,741	—

How we ranked them

Ranked by the share of households with one or more people under 18 (ACS Data Profile, 2020–2024). The Census Bureau does not publish a margin of error for this share in our files. ZIP codes need at least 1,000 residents to be ranked; 33 of 39 qualify.

Which of these to mail, and why

Households with children buy tutoring, youth sports, pediatric and family dental care, child care, birthday venues and family dining. EDDM reaches every door on a route, so a higher share means more of your pieces land with families.

The top five ZIP codes on this list hold 62,092 households, on 108 carrier routes with 67,744 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 40023 on the EDDM route map

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Businesses that mail these ZIP codes

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Frequently asked questions

Which ZIP code in Jefferson County has the highest share of households with children?: 40023 (Fisherville), at 35.9%, among 33 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by the share of households with one or more people under 18 (ACS Data Profile, 2020–2024). The Census Bureau does not publish a margin of error for this share in our files.
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.