| ZIP Code | 51003 |
|---|---|
| City | Alton |
| State | Iowa (IA) |
| County | Sioux County |
| Area Code | 712 |
| Elevation | 1,343 ft |
| Latitude | 42.989594 |
|---|---|
| Longitude | -95.985959 |
| Timezone | Chicago (DST) |
| FIPS | 19167 |
| ZIP Type | Standard |
| Status | Active |
Race & Ethnicity
Age Breakdown
Key Indicators
| Median Age | 34.7 yrs ↓ 8% since 2019 |
|---|---|
| Avg Household Size | 2.56 |
| Below Poverty | 2.2% ▼ 78% below avg |
| College Grads | 40.8% ≈ Avg |
| Unemployment | 1.8% ▼ 63% below avg |
| No HS Diploma | 3 (0.3%) |
| HS Graduate | 381 (35.1%) |
| Some College | 81 (7.5%) |
| Associates | 177 (16.3%) |
| Bachelors | 148 (13.7%) |
| Graduate Degree | 294 (27.1%) |
Education
Housing Tenure
Home Value Distribution
Financials
| Median HH Income | $85,909 ▲ 13% above avg ↑ 19% since 2019 |
|---|---|
| Median Home Value | $226,300 ▼ 19% below avg ↑ 49% since 2019 |
| Home/Income Ratio | 2.6x (nat avg ~3.5x) |
| Median Rent | $750/mo ↓ 2% since 2019 |
| Total Units | 762 |
| Vacant Units | 54 |
| Avg HH Size | 2.56 |
Income Distribution
How People Get to Work
Commute Time
Year Built
Summary
| Total Units | 762 |
|---|---|
| Vacant | 54 |
| Owner Occupied | 88.0% |
| Renter Occupied | 12.0% |
| Avg HH Size | 2.56 |
ZIP code 51003 is located in Alton, Iowa, within Sioux County. With a population of 1,815, this is a sparsely populated ZIP code with a relatively young community — the median age is 34.7 years. Economically, 51003 is a middle-income ZIP code: the median household income of $85,909 is near the national average.
Real estate in ZIP code 51003 represents an affordable housing market. The median home value of $226,300 is below the national average. Renters can expect to pay around $750 per month in median rent. Homeownership is strong here — 88.0% of occupied units are owner-occupied, suggesting an established, stable residential community. Median home values have increased by 49% since 2019.
The population of 51003 is primarily White (87.33%). Residents are well-educated — 40.8% hold a bachelor's degree or higher, which is near the national average. Poverty affects a relatively small share of residents at 2.2%. Household income has grown by 19% since 2019.
The unemployment rate in 51003 stands at 1.8%, which is well below the national average. As in most parts of the country, driving alone is the dominant commute mode at 86%.
Overall, ZIP code 51003 in Alton, IA is characterized as middle-income, well-educated, a relatively young community, and predominantly owner-occupied. With 1,815 residents, a median household income of $85,909, and a median home value of $226,300, it offers a clear picture of life in this part of Iowa.