ZIP code 51009
Where is ZIP code 51009?
Calumet, Iowa
O'Brien County · PO Box only ZIP code
ZIP code 51009 belongs to Calumet, Iowa in O'Brien County. 51009 is a PO Box only ZIP code: it is used for post office boxes at the Calumet post office, not for street addresses. It is in the Central Time zone and uses area code 712. About 113 people live in the 51009 area, where the median household income is $58,750. The closest ZIP codes are 51058 (Sutherland, 4.4 mi northeast), 51029 (Larrabee, 5.8 mi south) and 51046 (Paullina, 8.1 mi west).
| ZIP code | 51009 |
|---|---|
| Type | PO Box only (no street delivery) |
| Status | Active |
| City | Calumet |
| State | Iowa (IA) |
| County | O'Brien County |
| Time zone | Central Time · now |
| Area code | 712 |
| Coordinates | 42.9444, -95.5515 map |
| 3-digit prefix | 510 |
Population and income in 51009
| Population | 113 · lower than 93% of Iowa ZIP codes |
|---|---|
| People per square mile | 425 · higher than 89% of Iowa ZIP codes |
| Median age | 38.3 years · lower than 75% of Iowa ZIP codes |
| Men / women | 50% / 50% |
| Median household income | $58,750 · lower than 85% of Iowa ZIP codes |
| Income per person | $38,419 |
| Below the poverty line | 14% |
| Bachelor’s degree or higher | 21% of adults 25+ |
| Median home value | $83,300 · lower than 94% of Iowa ZIP codes |
| Housing units | 57 |
| Households | 50 (2.26 people on average) |
| Owners / renters | 96% / 4.0% |
| Land area | 0.27 sq mi |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 51009. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 51009
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 51058 | Sutherland, IA | 4.4 mi NE | Standard |
| 51029 | Larrabee, IA | 5.8 mi S | Standard |
| 51046 | Paullina, IA | 8.1 mi W | Standard |
| 51245 | Primghar, IA | 10.4 mi NW | Standard |
| 51047 | Peterson, IA | 10.8 mi E | Standard |
| 51037 | Meriden, IA | 11.8 mi SW | Standard |
| 51014 | Cleghorn, IA | 12.4 mi SW | Standard |
| 51012 | Cherokee, IA | 13.6 mi S | Standard |
| 51231 | Archer, IA | 15.4 mi NW | Standard |
| 51035 | Marcus, IA | 15.4 mi SW | Standard |
| 51033 | Linn Grove, IA | 16 mi E | Standard |
| 51357 | Royal, IA | 16 mi NE | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 51009 or measure the distance to another ZIP code.
How to address mail to 51009
PO BOX 123
CALUMET IA 51009
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (51009-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 51009?
- 51009 is a Calumet, Iowa ZIP code.
- What county is 51009 in?
- ZIP code 51009 is in O'Brien County, Iowa.
- What time zone is ZIP code 51009 in?
- 51009 is in the Central Time zone (America/Chicago).
- What area code is 51009?
- Phone numbers in ZIP code 51009 use area code 712.
- What is the population of ZIP code 51009?
- About 113 people live in ZIP code 51009, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 51009?
- The median household income in 51009 is $58,750 a year, lower than 85% of Iowa ZIP codes.
- Can I use 51009 for a street address?
- No. 51009 is only for PO Boxes. Street addresses in Calumet use another ZIP code.
- What ZIP codes are near 51009?
- The nearest ZIP codes to 51009 are 51058 (Sutherland, 4.4 miles), 51029 (Larrabee, 5.8 miles), 51046 (Paullina, 8.1 miles) and 51245 (Primghar, 10.4 miles).