Clay County, IA ZIP Codes
14 ZIP codes cover all or part of Clay County, Iowa. The Census Bureau counts 16,461 residents in the county, with a median household income of $65,428 and a median home value of $178,600. Median household income ranges from $63,402 in 51301 to $71,346 in 50585. Its largest communities include Spencer, Royal, Everly, Peterson and Linn Grove.
Clay County (Census county figures)
| Measure | Census figure |
|---|---|
| Residents | 16,461 |
| Households | 7,282 |
| Median household income | $65,428 |
| Median home value | $178,600 |
| Median age | 42.3 |
| Median rent | $811 |
All 14 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 19,767 |
| Households (sum of ZIP codes) | 8,669 |
| Median household income, range across ZIP codes | $63,402 (51301) to $71,346 (50585) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $64,018 |
| Homeowners | 75.2% |
| Households with kids under 18 | 22.6% |
| Moved in the past year | 9.1% |
| Carrier routes in EDDM2GO's route library | 5 routes, 874 homes (4 of 14 ZIP codes) |
Top facts
- Highest median household income in Clay County: 50585 ($71,346)
- Most residents: 51301 (12,638 people)
- Highest homeownership: 50585 (83.6% own their home)
- Most households with kids: 50585 (30.1% of households)
- Most new movers: 51301 (9.0% moved in last year)
- Youngest median age: 51301 (41.8 years)
- Highest median home value: 51301 ($188,300)
Every ZIP code in Clay County
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 51301 | Spencer | 12,638 | 5,680 | $63,402 | $188,300 | 70.3% | 22.5% | 9.0% | — | — | 100% of its land |
| 51358 | Ruthven | 1,213 | 508 | $64,583 | $150,500 | 82.1% | 19.5% | 8.2% | 2 | 355 | 36% of its land |
| 50585 | Sioux Rapids | 1,080 | 438 | $71,346 | $120,600 | 83.6% | 30.1% | 4.2% | — | — | 48% of its land |
| 51357 | Royal | 910 | 336 | $68,333 | $118,500 | 72.9% | 29.8% | 22.3% | — | — | 100% of its land |
| 51338 | Everly | 852 | 382 | $57,500 | $125,200 | 84.0% | 21.2% | 8.2% | 1 | 234 | 79% of its land |
| 51364 | Terril | 803 | 320 | $66,875 | $156,900 | 92.8% | 25.6% | 0.5% | 1 | 189 | 13% of its land |
| 51047 | Peterson | 693 | 314 | $101,000 | $130,300 | 88.9% | 15.9% | 5.3% | — | — | 55% of its land |
| 51033 | Linn Grove | 421 | 184 | $60,625 | $181,800 | 89.1% | 19.0% | 32.5% | — | — | 50% of its land |
| 51333 | Dickens | 374 | 164 | $110,833 | $195,600 | 92.1% | 22.0% | 5.4% | — | — | 100% of its land |
| 50515 | Ayrshire | 251 | 118 | $63,333 | $29,300 | 80.5% | 28.0% | 11.3% | — | — | 23% of its land |
| 51366 | Webb | 245 | 104 | $87,500 | $130,800 | 84.6% | 18.3% | 1.7% | 1 | 106 | 97% of its land |
| 51343 | Greenville | 172 | 73 | $60,625 | $98,800 | 80.8% | 12.3% | 1.2% | — | — | 100% of its land |
| 51340 | Fostoria | 75 | 37 | $90,250 | $133,800 | 89.2% | 16.2% | 8.0% | — | — | 100% of its land |
| 51341 | Gillett Grove | 40 | 11 | — | $61,000 | 100.0% | 27.3% | 0.0% | — | — | 100% of its land |
A ZIP code is listed for Clay 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
- Spencer — 11,400 residents · 1 ZIP code
- Royal — 585 residents · 1 ZIP code
- Everly — 584 residents · 1 ZIP code
- Peterson — 298 residents · 1 ZIP code
- Linn Grove — 215 residents · 1 ZIP code
- Fostoria — 181 residents · 2 ZIP codes
- Dickens — 131 residents · 1 ZIP code
- Webb — 102 residents · 1 ZIP code
- Rossie — 88 residents · 1 ZIP code
- Greenville — 62 residents · 1 ZIP code
- Gillett Grove — 40 residents · 1 ZIP code
Price a mailing to Clay County ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Clay County, IA?
- 51301, 51358, 50585, 51357, 51338, 51364, 51047, 51033, 51333, 50515, 51366, 51343, 51340 and 51341. Some cross the county line; the table shows each ZIP's share of land in the county.
- What is the population of Clay County?
- 16,461 residents in 7,282 households (ACS 5-year estimates, 2020–2024).
- What is the median household income in Clay County?
- $65,428 for the county as a whole. Its ZIP codes range from $63,402 (51301) to $71,346 (50585).
- Which Clay County ZIP code has the highest median household income?
- 50585, at $71,346, among ZIP codes with at least 1,000 residents.
- How many carrier routes and mailboxes are in Clay County?
- For the 4 of 14 ZIP codes in EDDM2GO's stored route library: 5 carrier routes reaching 874 residential and 10 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.