ZIP Code 51231
ZIP Code Tabulation Area in O'Brien County, Iowa.
- Population
- 543
- Median household income
- $105,388
- Median home value
- $179,600
+40.7%’19–’23
+86.0%’19–’23
+111.3%’19–’23
Covering part of O'Brien County, Iowa, ZIP Code 51231 has about 543 residents. Its median household income of $105,388 runs above the O'Brien County figure of $68,216.
Between 2019 and 2023, ZIP Code 51231's population grew 40.7% from 386 to 543, while its median household income rose 86.0% from $56,667 to $105,388.
88.7% of workers drive to work alone. 98.7% of homes are single-family detached houses.
Demographics
ACS 2019–2023- Population
- 543
- Median age
- 16.3 yrs
- Median household income
- $105,388
- Median home value
- $179,600
- Median gross rent
- —
- Housing units
- 154
- Homeownership rate
- 93.4%
- Bachelor's degree or higher
- 34.9%
- Unemployment rate
- 0.5%
Trends
ACS 5-year · 2019–2023386543
$56,667$105,388
$85,000$179,600
| Year | Population | Median household income | Median home value |
|---|---|---|---|
| 2019 | 386 | $56,667 | $85,000 |
| 2020 | 583 | $87,694 | $157,200 |
| 2021 | 659 | $92,518 | $159,900 |
| 2022 | 621 | $100,547 | $184,700 |
| 2023 | 543 | $105,388 | $179,600 |
Each year is a US Census Bureau ACS 5-year estimate ending that year.
Age distribution
Under 516.8%
5 to 1735.5%
18 to 241.3%
25 to 3418.6%
35 to 4412.0%
45 to 543.1%
55 to 644.2%
65 to 746.4%
75 and over2.0%
| Count | Share | |
|---|---|---|
| Under 5 | 91 | 16.8% |
| 5 to 17 | 193 | 35.5% |
| 18 to 24 | 7 | 1.3% |
| 25 to 34 | 101 | 18.6% |
| 35 to 44 | 65 | 12.0% |
| 45 to 54 | 17 | 3.1% |
| 55 to 64 | 23 | 4.2% |
| 65 to 74 | 35 | 6.4% |
| 75 and over | 11 | 2.0% |
Race & ethnicity
| Count | Share | |
|---|---|---|
| White (non-Hispanic) | 542 | 99.8% |
| Black or African American | 0 | 0.0% |
| American Indian & Alaska Native | 0 | 0.0% |
| Asian | 0 | 0.0% |
| Native Hawaiian & Pacific Islander | 0 | 0.0% |
| Some other race | 0 | 0.0% |
| Two or more races | 0 | 0.0% |
| Hispanic or Latino (any race) | 1 | 0.2% |
Educational attainment (age 25+)
No high school diploma2.0%
High school graduate23.0%
Some college or associate's40.1%
Bachelor's degree32.9%
Graduate or professional degree2.0%
| Count | Share | |
|---|---|---|
| No high school diploma | 5 | 2.0% |
| High school graduate | 58 | 23.0% |
| Some college or associate's | 101 | 40.1% |
| Bachelor's degree | 83 | 32.9% |
| Graduate or professional degree | 5 | 2.0% |
Commute to work
- Mean travel time to work
- 26 min
Drove alone88.7%
Carpooled5.4%
Public transit0.0%
Walked1.0%
Bicycle0.0%
Worked from home4.9%
Other means0.0%
How workers get to work
| Count | Share | |
|---|---|---|
| Drove alone | 180 | 88.7% |
| Carpooled | 11 | 5.4% |
| Public transit | 0 | 0.0% |
| Walked | 2 | 1.0% |
| Bicycle | 0 | 0.0% |
| Worked from home | 10 | 4.9% |
| Other means | 0 | 0.0% |
Travel time
| Count | Share | |
|---|---|---|
| Under 15 min | 40 | 20.7% |
| 15 to 29 min | 56 | 29.0% |
| 30 to 44 min | 60 | 31.1% |
| 45 to 59 min | 37 | 19.2% |
| 60+ min | 0 | 0.0% |
Households
- Average household size
- 3.57
- Poverty rate
- 28.0% (152 of 543)
| Count | Share | |
|---|---|---|
| Family households | 124 | 81.6% |
| Nonfamily households | 28 | 18.4% |
Housing
- Median year structure built
- 1956
Occupancy
| Count | Share | |
|---|---|---|
| Occupied | 152 | 98.7% |
| Vacant | 2 | 1.3% |
Tenure (of occupied units)
| Count | Share | |
|---|---|---|
| Owner-occupied | 142 | 93.4% |
| Renter-occupied | 10 | 6.6% |
1-unit, detached98.7%
1-unit, attached0.6%
2 to 4 units0.0%
5 to 19 units0.0%
20 or more units0.0%
Mobile home & other0.6%
Units in structure
| Count | Share | |
|---|---|---|
| 1-unit, detached | 152 | 98.7% |
| 1-unit, attached | 1 | 0.6% |
| 2 to 4 units | 0 | 0.0% |
| 5 to 19 units | 0 | 0.0% |
| 20 or more units | 0 | 0.0% |
| Mobile home & other | 1 | 0.6% |
Geography
- ZCTA
- 51231
- Land area
- 24 sq mi
- Water area
- 0 sq mi
- Center point
- 43.1057, -95.7413
Counties this ZIP covers
1Compare with nearby ZIP codes
6National ZIP rankings
21- Largest by population
- Most densely populated
- Highest median household income
- Highest median home value
- Most affordable home values
- Highest median gross rent
- Cheapest median gross rent
- Oldest by median age
- Youngest by median age
- Most college-educated
- Highest poverty rate
- Lowest poverty rate
- Highest homeownership rate
- Lowest homeownership rate
- Longest commutes
- Shortest commutes
- Largest households
- Newest housing
- Oldest housing
- Fastest-growing (2019–2023)
- Fastest-shrinking (2019–2023)