ZIP code 51111
Where is ZIP code 51111?
Sioux City, Iowa
Woodbury County · Standard ZIP code
ZIP code 51111 belongs to Sioux City, Iowa in Woodbury County. 51111 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 39 people live in the 51111 area. The closest ZIP codes are 51054 (Sergeant Bluff, 1 mi southeast), 51102 (Sioux City, 3.9 mi southeast) and 51106 (Sioux City, 4.1 mi north).
| ZIP code | 51111 |
|---|---|
| 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 | 42.4089, -96.3713 map |
| 3-digit prefix | 511 |
Population and income in 51111
| Population | 39 · lower than 99% of Iowa ZIP codes |
|---|---|
| People per square mile | 6 · lower than 95% of Iowa ZIP codes |
| Median age | 26.4 years · lower than 98% of Iowa ZIP codes |
| Men / women | 62% / 39% |
| Income per person | $29,128 |
| Below the poverty line | 0.0% |
| Bachelor’s degree or higher | 0.0% of adults 25+ |
| Housing units | 27 |
| Households | 27 (1.44 people on average) |
| Owners / renters | 0.0% / 100% |
| Land area | 6.06 sq mi (plus 0.24 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 51111. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 51111
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 51054 | Sergeant Bluff, IA | 1 mi SE | Standard |
| 51102 | Sioux City, IA | 3.9 mi SE | PO Box only |
| 51106 | Sioux City, IA | 4.1 mi N | Standard |
| 68776 | South Sioux City, NE | 4.6 mi NW | Standard |
| 68731 | Dakota City, NE | 4.6 mi SW | Standard |
| 51101 | Sioux City, IA | 6.3 mi N | Standard |
| 51105 | Sioux City, IA | 6.5 mi N | Standard |
| 51052 | Salix, IA | 6.9 mi SE | Standard |
| 68030 | Homer, NE | 7.2 mi SW | Standard |
| 51103 | Sioux City, IA | 7.4 mi NW | Standard |
| 51104 | Sioux City, IA | 8.2 mi N | Standard |
| 51007 | Bronson, IA | 8.9 mi E | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 51111 or measure the distance to another ZIP code.
How to address mail to 51111
123 MAIN ST
SIOUX CITY IA 51111
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (51111-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 51111?
- 51111 is a Sioux City, Iowa ZIP code.
- What county is 51111 in?
- ZIP code 51111 is in Woodbury County, Iowa.
- What time zone is ZIP code 51111 in?
- 51111 is in the Central Time zone (America/Chicago).
- What area code is 51111?
- Phone numbers in ZIP code 51111 use area codes 402, 531 and 712.
- What is the population of ZIP code 51111?
- About 39 people live in ZIP code 51111, according to the Census Bureau’s American Community Survey (2020–2024).
- What ZIP codes are near 51111?
- The nearest ZIP codes to 51111 are 51054 (Sergeant Bluff, 1 miles), 51102 (Sioux City, 3.9 miles), 51106 (Sioux City, 4.1 miles) and 68776 (South Sioux City, 4.6 miles).