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

78642 (Liberty Hill), at 50.0%, among 22 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 Williamson County, TX

These are the 22 ZIP codes in Williamson County with the highest share of households with children, out of 22 with at least 1,000 residents. 78642 (Liberty Hill, 50.0%), 78634 (Hutto, 44.9%) and 76537 (Jarrell, 44.8%) lead the list. There is no single "best" ZIP code in Williamson 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 Williamson County

Rank	ZIP	Mailing city	Households with children under 18	Residents	Households	Residential mailboxes
1	78642	Liberty Hill	50.0%	26,434	8,696	14,168
2	78634	Hutto	44.9%	46,413	15,808	21,724
3	76537	Jarrell	44.8%	16,272	5,448	10,169
4	78641	Leander	44.0%	99,865	35,410	48,032
5	78681	Round Rock	43.0%	56,691	20,135	21,501
6	78665	Round Rock	42.1%	66,171	24,162	30,636
7	78717	Austin	40.8%	37,262	14,939	18,089
8	78615	Coupland	40.4%	1,637	549	666
9	78613	Cedar Park	39.2%	89,956	33,919	35,237
10	78626	Georgetown	39.0%	48,072	16,813	23,417
11	76527	Florence	37.8%	4,918	1,582	1,897
12	78621	Elgin	35.7%	30,411	10,175	12,832
13	76511	Bartlett	35.0%	2,702	920	859
14	76578	Thrall	34.2%	1,762	571	721
15	78628	Georgetown	34.1%	50,822	19,084	27,555
16	78750	Austin	32.4%	29,277	11,875	11,595
17	76530	Granger	31.9%	2,598	959	969
18	78664	Round Rock	31.6%	62,060	23,484	23,993
19	76574	Taylor	26.8%	20,242	7,752	8,408
20	78728	Austin	26.1%	26,777	13,169	14,485
21	78729	Austin	24.9%	30,460	14,500	15,015
22	78633	Georgetown	10.2%	29,309	14,245	18,369

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; 22 of 24 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 85,497 households, on 129 carrier routes with 115,594 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 78642 on the EDDM route map

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Frequently asked questions

Which ZIP code in Williamson County has the highest share of households with children?: 78642 (Liberty Hill), at 50.0%, among 22 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.