ZIP codes with the most families with kids in Sioux City, IA
These are the 7 ZIP codes in Sioux City, IA with the highest share of households with children, out of 7 with at least 1,000 residents. 51105 (Sioux City, 42.6%), 51108 (Sioux City, 39.3%) and 51104 (Sioux City, 33.5%) lead the list. There is no single "best" ZIP code in Sioux City; 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 Sioux City
| Rank | ZIP | Mailing city | Households with children under 18 | Residents | Households | Residential mailboxes |
|---|---|---|---|---|---|---|
| 1 | 51105 | Sioux City | 42.6% | 10,415 | 3,596 | — |
| 2 | 51108 | Sioux City | 39.3% | 5,960 | 2,160 | 2,392 |
| 3 | 51104 | Sioux City | 33.5% | 23,197 | 8,729 | 9,023 |
| 4 | 51103 | Sioux City | 31.5% | 16,895 | 6,402 | — |
| 5 | 51106 | Sioux City | 29.5% | 28,592 | 11,249 | 12,247 |
| 6 | 51109 | Sioux City | 29.0% | 3,606 | 1,447 | — |
| 7 | 51101 | Sioux City | 17.2% | 1,031 | 640 | — |
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; 7 of 8 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 32,136 households. Open any of them on the route map to see each carrier route's own figures before you choose.
Open 51105 on the EDDM route map
More rankings
- Richest ZIP codes in Sioux City
- ZIP codes with the highest home values in Sioux City
- ZIP codes with the highest homeownership in Sioux City
- ZIP codes with the most new movers in Sioux City
- Youngest ZIP codes in Sioux City
- Oldest ZIP codes in Sioux City
- Fastest-growing ZIP codes in Sioux City
- ZIP codes with the most families with kids in Woodbury County
- All Sioux City ZIP codes
Businesses that mail these ZIP codes
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EDDM guides
Frequently asked questions
- Which ZIP code in Sioux City has the highest share of households with children?
- 51105 (Sioux City), at 42.6%, among 7 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.