51301 ZIP Code, Spencer, IA
51301 is a ZIP code in Spencer, Iowa in Clay County. It covers 158 square miles of land. The closest ZIP codes are 51340, 51333 and 51338. 12,638 people live here in 5,680 households, more than in 9 of every 10 Iowa ZIP codes. It is rural, with fewer than 100 people per square mile, and most homes are owner-occupied (70%). Median household income is $63,402, below the Iowa median of $75,059.
Quick facts
- Mailing city: Spencer, IA
- County: Clay County
- Land area: 158 sq mi
- Population: 12,638
- Median household income: $63,402
Key figures
| Measure | Value |
|---|---|
| Residents | 12,638 |
| Households | 5,680 |
| Median household income | $63,402 |
| Income per person | $37,984 |
| Median age | 41.8 |
| Homeowners | 70.3% |
| Median home value | $188,300 |
| Median rent | $807 |
| Bachelor's degree or higher | 29.0% |
| Average commute (minutes) | 16.2 |
| Households with kids under 18 | 22.5% |
| Moved in the past year | 9.0% |
| Below the poverty line | 13.1% |
| Broadband internet | 89.8% |
| Speak a non-English language at home | 3.5% |
Household income
| % of households | Value |
|---|---|
| <$10K | 2.5% |
| $10–15K | 4.3% |
| $15–25K | 8.5% |
| $25–35K | 8.7% |
| $35–50K | 17.0% |
| $50–75K | 17.1% |
| $75–100K | 13.3% |
| $100–150K | 16.5% |
| $150–200K | 6.9% |
| $200K+ | 5.1% |
Age
| % of all residents | Value |
|---|---|
| <10 | 12.4% |
| 10–19 | 12.6% |
| 20–24 | 5.1% |
| 25–34 | 11.5% |
| 35–44 | 12.2% |
| 45–54 | 10.7% |
| 55–64 | 13.3% |
| 65–74 | 12.0% |
| 75+ | 10.2% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 36.9% |
| Owned outright | 28.2% |
| Rented | 26.9% |
| Vacant | 8.1% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 67.9% |
| Townhome | 2.8% |
| 2–4 units | 8.2% |
| 5–19 units | 9.4% |
| 20+ units | 9.7% |
| Mobile / other | 2.0% |
Businesses in 51301
483 business establishments with 6,534 employees (ZIP Codes Business Patterns 2023).
- Retail Trade: 88
- Health Care and Social Assistance: 55
- Construction: 46
- Accommodation and Food Services: 43
- Other Services (except Public Administration): 41
- Wholesale Trade: 37
- Professional, Scientific, and Technical Services: 30
- Finance and Insurance: 27
EDDM carrier routes
See every USPS carrier route in 51301 with residential and business mailbox counts on the route map. Open the EDDM route map.
Nearby ZIP codes
- 51340 — Fostoria city, IA (6 mi)
- 51333 — Dickens city, IA (7.6 mi)
- 51338 — Everly city, IA (9.2 mi)
- 51343 — Greenville city, IA (9.4 mi)
- 51357 — Royal city, IA (9.4 mi)
- 51341 — Gillett Grove city, IA (10.9 mi)
- 51351 — Milford city, IA (11.3 mi)
- 51358 — Ruthven city, IA (13 mi)
Areas that include 51301
- Spencer, IA ZIP codes — 1 ZIP code
- Fostoria, IA ZIP codes — 2 ZIP codes
- Clay County ZIP codes — 14 ZIP codes
- Iowa ZIP code data
Mail every home in 51301
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 51301, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 51301 in?
- 51301 is a Spencer, IA mailing address. By land area, 7% lies inside Spencer; the rest is outside any Census-defined city or community.
- What county is 51301 in?
- 51301 is in Clay County.
- What is the population of 51301?
- About 12,638 people (±274), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 12,606.
- What is the median household income in 51301?
- $63,402 (±$6,029), compared with $75,059 for Iowa as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 51301?
- EDDM2GO's stored route library does not include 51301 yet. The EDDM route map loads its carrier routes and mailbox counts when you search the ZIP code.
- What ZIP codes are near 51301?
- The closest, measured center to center: 51340 (6 mi, Fostoria), 51333 (7.6 mi, Dickens), 51338 (9.2 mi, Everly), 51343 (9.4 mi, Greenville), 51357 (9.4 mi, Royal) and 51341 (10.9 mi, Gillett Grove).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.