Inwood, IA · standard
ZIP Code 51240
Lyon County, Iowa - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 1,746
- 7/sq mi Low-density area
- $83,929
- Median income Above-median income area
- $232,600
- Median home value Near-median home value
- 16.5%
- Bachelor's or higher Below-average bachelor's attainment
National ZIP placement
Inwood pairs an above-median household income with above-median home values, in a rural, homeowner-dominated area.
- Top 33%
- household income, US ZIPs
- Top 47%
- home value, US ZIPs
- 7
- people per sq mi
- 87%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 51240 against every reporting US ZIP.
FHFA HPI release change
What changed in the latest House Price Index year
- FHFA House Price Index values in ZIP 51240 (Inwood, IA) rose +29.3% from 2023 to 2024. The all-transactions index moved from 252.5 in 2023 to 326.4 in 2024 (2000 = 100).
ZIP code 51240 covers 264.5 square miles in Inwood, Lyon County, Iowa (a standard USPS delivery area), with a modest 1,746 residents on file, a density of 7 people per square mile, in the Chicago time zone.
ZIP 51240 lands in the middle-income range, with a median household income of $83,929 (10% above the average Iowa ZIP), while per-capita income is $41,804. Both reported hardship measures are comparatively low in absolute terms: poverty is 3.0% and unemployment is 1.4%. Housing is both higher-cost and owner-heavy: median home value is $232,600 (32% above the average Iowa ZIP), while 86.9% of occupied homes are owner-occupied and median rent is $993.
Educational attainment sits below the national norm: 16.5% of adults hold a bachelor's degree or higher, the median age is 34.4, and the average commute is 23 minutes. The page also surfaces 5 ZIP codes within roughly 10 miles and 6 more in Lyon County, so 51240 can be compared with both its immediate and county-level context.
Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →
Top industries in ZIP 51240
Top 5 sectors by establishment count in Inwood, IA
Which industries have the most business establishments in ZIP 51240.
- Construction
Construction
15 establishments
- Transportation and warehousing
Transportation and warehousing
12 establishments
- Retail trade
Retail trade
8 establishments
- Other services (except public administration)
Other services (except public administration)
7 establishments
- Wholesale trade 5
Wholesale trade
5 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 51240, Inwood, IA · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.
Quick Facts
1,746
Population
264.5
Area (sq mi)
7
People / sq mi
Chicago
Time Zone
standard
ZIP Type
Who lives in ZIP 51240?
34.4
Median Age
48.7%
Male
51.3%
Female
3.8%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$83,929
Median Household Income
+10% vs state ZIP avg
$41,804
Per Capita Income
3.0%
Poverty Rate
1.4%
Unemployment Rate
22.7 min
Mean Commute Time
How ZIP 51240 ranks among Iowa ZIPs
Inwood, IA household income vs. every Iowa ZIP code
Median household income among 911 reporting Iowa ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$83,929 Top 30% higher than 70% of 911 Iowa ZIPs
Each bar is a $20K-wide band; taller bars hold more Iowa ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
673housing units
673
Total Housing Units
632
Occupied Units
41
Vacant Units
2.97
Avg Household Size
Occupancy Type
$232,600
Median Home Value
+32% vs state ZIP avg
$993
Median Rent
1977
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How have home values changed over time?
FHFA House Price Index, annual appreciation data based on repeat sales and appraisals
+29.3%
YoY Change (2024)
326
HPI Index (2000 = 100)
+226%
Total Change Since 2000
Home values in ZIP 51240 have increased 29.3% over the past year (2024). Since 2000, this ZIP has seen +226% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +0.2% | 203 |
| 2021 | +14.8% | 233 |
| 2022 | +19.7% | 279 |
| 2023 | -9.7% | 252 |
| 2024 | +29.3% | 326 |
Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 67 business establishments in ZIP 51240, employing approximately 446 people with a combined annual payroll of $14,778,000.
67
Businesses
446
Employees
$14.8M
Annual Payroll
8
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Construction | 15 | 22.4% |
| Transportation and warehousing | 12 | 17.9% |
| Retail trade | 8 | 11.9% |
| Other services (except public administration) | 7 | 10.4% |
| Wholesale trade | 5 | 7.5% |
| Manufacturing | 4 | 6.0% |
| Finance and insurance | 3 | 4.5% |
| Accommodation and food services | 3 | 4.5% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 51240 vs 51241 →
ZIP 51240 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 51247
Rock Valley (51247)
4,870 residents
- 51240 1,746
Inwood (51240)
1,746 residents
- 51241 1,737
Larchwood (51241)
1,737 residents
- 51230 462
Alvord (51230)
462 residents
- 51242 212
Lester (51242)
212 residents
- 57027 109
Fairview (57027)
109 residents
What this shows Among its immediate neighbors, ZIP 51240 ranks #2 by population - useful context the national average alone can't give.
ZIP 51240 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 51242
Lester (51242)
$95,625 median income
- 51241
Larchwood (51241)
$87,446 median income
- 51240
Inwood (51240)
$83,929 median income
- 51247
Rock Valley (51247)
$78,358 median income
- 51230
Alvord (51230)
$75,625 median income
What this shows By household income, ZIP 51240 ranks #3 of 5 neighboring ZIPs, local affluence varies block to block, not just metro to metro.
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 51240, both outside IA so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (1,746 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Lyon County
Related Areas
Frequently Asked Questions
What county is ZIP code 51240 in?
ZIP code 51240 (Inwood) is located in Lyon County, Iowa. Lyon County contains multiple ZIP codes, see the full list at /counties/lyon-ia.
What is the population of ZIP code 51240?
ZIP code 51240 in Inwood, IA has a population of 1,746 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 51240?
The median household income in ZIP 51240 is $83,929, which is 10% above the national average of $76,288.
What is the average home value in ZIP 51240?
The median home value in ZIP 51240 is $232,600, which is 16% below the national average of $278,155.
What is the demographic makeup of ZIP 51240?
The largest racial group in ZIP 51240 is White at 94.5%. Hispanic or Latino residents make up 1.7% of the population.
How many businesses are in ZIP code 51240?
ZIP code 51240 has 67 business establishments employing approximately 446 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 51240?
The top industries by establishment count in ZIP 51240 are: Construction (15), Transportation and warehousing (12), Retail trade (8). There are 8 industry sectors represented in total.
How have home values changed in ZIP code 51240?
According to the FHFA House Price Index, home values in ZIP 51240 increased by 29.3% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 226%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 51240?
In ZIP code 51240, 47.7% of residents aged 25+ have a high school diploma or higher, and 16.5% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 51240?
The mean commute time for workers in ZIP code 51240 is 22.7 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend less time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 51240?
In ZIP code 51240, approximately 86.9% of occupied housing units are owner-occupied and 13.1% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 51240?
The poverty rate in ZIP code 51240 is 3.0% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.
Related
Take this with you
What to do with ZIP 51240's numbers, next.
- See how ZIP 51240 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Inwood, IA ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.