ZIP code 51103
Where is ZIP code 51103?
Sioux City, Iowa
Woodbury County · Standard ZIP code
ZIP code 51103 belongs to Sioux City, Iowa in Woodbury County. 51103 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Central Time zone and uses area codes 402, 531 and 712. About 16,895 people live in the 51103 area, where the median household income is $58,197. The closest ZIP codes are 51101 (Sioux City, 1.5 mi southeast), 51104 (Sioux City, 2 mi northeast) and 51105 (Sioux City, 2.4 mi east).
| ZIP code | 51103 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Sioux City |
| State | Iowa (IA) |
| County | Woodbury County |
| Time zone | Central Time · now |
| Area codes | 402, 531, 712 |
| Coordinates | 42.5068, -96.4295 map |
| 3-digit prefix | 511 |
Population and income in 51103
| Population | 16,895 · higher than 95% of Iowa ZIP codes |
|---|---|
| People per square mile | 1,400 · higher than 95% of Iowa ZIP codes |
| Median age | 35.5 years · lower than 87% of Iowa ZIP codes |
| Men / women | 49% / 51% |
| Median household income | $58,197 · lower than 85% of Iowa ZIP codes |
| Income per person | $27,717 |
| Below the poverty line | 21% |
| Bachelor’s degree or higher | 18% of adults 25+ |
| Median home value | $142,900 · lower than 62% of Iowa ZIP codes |
| Median rent | $906 a month |
| Housing units | 6,848 |
| Households | 6,402 (2.57 people on average) |
| Owners / renters | 66% / 34% |
| Land area | 12.06 sq mi (plus 0.18 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 51103. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 51103
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 51101 | Sioux City, IA | 1.5 mi SE | Standard |
| 51104 | Sioux City, IA | 2 mi NE | Standard |
| 51105 | Sioux City, IA | 2.4 mi E | Standard |
| 51109 | Sioux City, IA | 2.7 mi W | Standard |
| 68776 | South Sioux City, NE | 2.9 mi S | Standard |
| 57049 | North Sioux City, SD | 4.2 mi W | Standard |
| 51108 | Sioux City, IA | 4.4 mi NE | Standard |
| 51106 | Sioux City, IA | 4.8 mi SE | Standard |
| 51111 | Sioux City, IA | 7.4 mi SE | Standard |
| 51054 | Sergeant Bluff, IA | 8.2 mi SE | Standard |
| 68743 | Jackson, NE | 8.3 mi SW | Standard |
| 68731 | Dakota City, NE | 8.8 mi S | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 51103 or measure the distance to another ZIP code.
How to address mail to 51103
123 MAIN ST
SIOUX CITY IA 51103
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (51103-XXXX) helps mail sort faster but isn’t required.
Other ZIP codes in Sioux City, IA
All Sioux City ZIP codes with population and income →
Questions
- What city is ZIP code 51103?
- 51103 is a Sioux City, Iowa ZIP code.
- What county is 51103 in?
- ZIP code 51103 is in Woodbury County, Iowa.
- What time zone is ZIP code 51103 in?
- 51103 is in the Central Time zone (America/Chicago).
- What area code is 51103?
- Phone numbers in ZIP code 51103 use area codes 402, 531 and 712.
- What is the population of ZIP code 51103?
- About 16,895 people live in ZIP code 51103, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 51103?
- The median household income in 51103 is $58,197 a year, lower than 85% of Iowa ZIP codes.
- What ZIP codes are near 51103?
- The nearest ZIP codes to 51103 are 51101 (Sioux City, 1.5 miles), 51104 (Sioux City, 2 miles), 51105 (Sioux City, 2.4 miles) and 51109 (Sioux City, 2.7 miles).