O'Brien County, IA ZIP Codes
11 ZIP codes cover all or part of O'Brien County, Iowa. The Census Bureau counts 14,126 residents in the county, with a median household income of $68,356 and a median home value of $173,100. Median household income ranges from $63,036 in 51058 to $84,125 in 51046. Its largest communities include Hartley, Sanborn, Primghar, Paullina and Sutherland.
O'Brien County (Census county figures)
| Measure | Census figure |
|---|---|
| Residents | 14,126 |
| Households | 5,809 |
| Median household income | $68,356 |
| Median home value | $173,100 |
| Median age | 39.5 |
| Median rent | $868 |
All 11 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 17,408 |
| Households (sum of ZIP codes) | 6,990 |
| Median household income, range across ZIP codes | $63,036 (51058) to $84,125 (51046) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $70,550 |
| Homeowners | 78.5% |
| Households with kids under 18 | 26.6% |
| Moved in the past year | 12.7% |
| Carrier routes in EDDM2GO's route library | 14 routes, 2,772 homes (6 of 11 ZIP codes) |
Top facts
- Highest median household income in O'Brien County: 51046 ($84,125)
- Most residents: 51201 (6,430 people)
- Highest homeownership: 51238 (87.9% own their home)
- Most households with kids: 51245 (36.6% of households)
- Most new movers: 51201 (18.9% moved in last year)
- Youngest median age: 51245 (33.4 years)
- Highest median home value: 51201 ($197,800)
Every ZIP code in O'Brien County
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 51201 | Sheldon | 6,430 | 2,550 | $68,799 | $197,800 | 71.6% | 27.4% | 18.9% | — | — | 49% of its land |
| 51346 | Hartley | 2,247 | 963 | $72,426 | $156,800 | 82.7% | 21.2% | 12.3% | 4 | 1,083 | 71% of its land |
| 51248 | Sanborn | 1,534 | 686 | $64,375 | $172,800 | 76.2% | 22.4% | 14.7% | 2 | 629 | 90% of its land |
| 51238 | Hospers | 1,502 | 556 | $74,000 | $182,500 | 87.9% | 27.5% | 0.5% | 2 | 251 | 32% of its land |
| 51245 | Primghar | 1,377 | 475 | $69,531 | $149,700 | 78.9% | 36.6% | 16.1% | — | — | 100% of its land |
| 51046 | Paullina | 1,326 | 637 | $84,125 | $160,300 | 76.0% | 16.5% | 8.8% | 3 | 351 | 95% of its land |
| 51058 | Sutherland | 1,096 | 424 | $63,036 | $133,000 | 82.3% | 28.3% | 9.7% | 2 | 347 | 93% of its land |
| 51022 | Granville | 960 | 385 | $96,505 | $174,800 | 89.1% | 31.4% | 2.1% | 1 | 235 | 58% of its land |
| 51231 | Archer | 562 | 141 | $108,058 | $189,500 | 94.3% | 72.3% | 0.7% | — | — | 100% of its land |
| 51029 | Larrabee | 261 | 123 | $86,042 | — | 98.4% | 13.8% | 5.0% | — | — | 15% of its land |
| 51009 | Calumet | 113 | 50 | $58,750 | $83,300 | 96.0% | 28.0% | 0.9% | — | — | 100% of its land |
A ZIP code is listed for O'Brien County when at least 10% of its land is in the county, when it holds at least 10% of the county's land, or when the county is its main county. Totals add up whole ZIP codes, including parts that cross the county line; the Census county figures above do not.
Cities and communities
- Hartley — 1,553 residents · 1 ZIP code
- Sanborn — 1,323 residents · 1 ZIP code
- Primghar — 1,014 residents · 1 ZIP code
- Paullina — 869 residents · 1 ZIP code
- Sutherland — 629 residents · 1 ZIP code
- Granville — 265 residents · 1 ZIP code
- Archer — 130 residents · 1 ZIP code
- Calumet — 113 residents · 1 ZIP code
Rankings
- Richest ZIP codes in O'Brien County — 7 ZIP codes ranked
- ZIP codes with the highest home values in O'Brien County — 7 ZIP codes ranked
- ZIP codes with the highest homeownership in O'Brien County — 7 ZIP codes ranked
- ZIP codes with the most families with kids in O'Brien County — 7 ZIP codes ranked
- ZIP codes with the most new movers in O'Brien County — 7 ZIP codes ranked
- Youngest ZIP codes in O'Brien County — 7 ZIP codes ranked
- Oldest ZIP codes in O'Brien County — 7 ZIP codes ranked
- Fastest-growing ZIP codes in O'Brien County — 6 ZIP codes ranked
Price a mailing to O'Brien County ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in O'Brien County, IA?
- 51201, 51346, 51248, 51238, 51245, 51046, 51058, 51022, 51231, 51029 and 51009. Some cross the county line; the table shows each ZIP's share of land in the county.
- What is the population of O'Brien County?
- 14,126 residents in 5,809 households (ACS 5-year estimates, 2020–2024).
- What is the median household income in O'Brien County?
- $68,356 for the county as a whole. Its ZIP codes range from $63,036 (51058) to $84,125 (51046).
- Which O'Brien County ZIP code has the highest median household income?
- 51046, at $84,125, among ZIP codes with at least 1,000 residents. See the full ranking of O'Brien County ZIP codes by income.
- How many carrier routes and mailboxes are in O'Brien County?
- For the 6 of 11 ZIP codes in EDDM2GO's stored route library: 14 carrier routes reaching 2,772 residential and 125 business mailboxes. The route map loads the rest when you search them.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.