US ZIP Code
50138

Knoxville, IA

Marion County  ·  Iowa

● Active
👥 11,374 Population ↓ 5% since 2019
💰 $76,887 Median HH Income
≈ Avg ↑ 37% since 2019
🎂 42.8 Median Age
🏠 $169,900 Median Home Value
▼ 39% below avg ↑ 51% since 2019
🎓 40.3% College Grads
≈ Avg
📊 2.4% Unemployment
▼ 51% below avg ↓ 4% since 2019
ZIP Code Details
ZIP Code50138
CityKnoxville
StateIowa (IA)
CountyMarion County
Area Code641
Elevation791 ft
Latitude41.302889
Longitude-93.107738
TimezoneChicago (DST)
FIPS19125
ZIP TypeStandard
StatusActive
People & Population (ACS 2023)
♂ Male 47.8% (5,436) Female 52.2% (5,938) ♀

Race & Ethnicity

White: 93.9%Hispanic: 2%Black: 0.4%Asian: 0.8%Other: 2.8%Race
White93.9%
Hispanic2.0%
Black0.4%
Asian0.8%
Other2.8%

Age Breakdown

Under 5
4%
5–17
16%
18–24
8%
25–44
22%
45–64
28%
65+
10%

Key Indicators

Median Age42.8 yrs
Avg Household Size2.34
Below Poverty8.5% ▼ 15% below avg
College Grads40.3% ≈ Avg
Unemployment2.4% ▼ 51% below avg
No HS Diploma7 (0.1%)
HS Graduate2,655 (34.8%)
Some College951 (12.5%)
Associates938 (12.3%)
Bachelors865 (11.3%)
Graduate Degree2,206 (28.9%)

Education

No HS: 0.1%HS Grad: 34.8%Some College: 12.5%Associates: 12.3%Bachelors: 11.3%Graduate: 28.9%Edu
No HS0.1%
HS Grad34.8%
Some College12.5%
Associates12.3%
Bachelors11.3%
Graduate28.9%
Housing & Income

Housing Tenure

Owner: 79.8%Renter: 20.2%Tenure
Owner79.8%
Renter20.2%

Home Value Distribution

Under $50k
8%
$50k–100k
16%
$100k–150k
17%
$150k–200k
17%
$200k–300k
21%
$300k–500k
13%
Over $500k
9%

Financials

Median HH Income$76,887 ≈ Avg ↑ 37% since 2019
Median Home Value$169,900 ▼ 39% below avg ↑ 51% since 2019
Home/Income Ratio2.2x (nat avg ~3.5x)
Median Rent$815/mo ↑ 20% since 2019
Total Units5,181
Vacant Units417
Avg HH Size2.34

Income Distribution

Under $25k
14%
$25k–50k
14%
$50k–75k
18%
$75k–100k
17%
$100k–150k
19%
$150k–200k
10%
Over $200k
8%
Employment & Commute

How People Get to Work

Drove Alone
87%
Walked
1%
Work From Home
12%

Commute Time

Under 15 min
46%
15–30 min
26%
30–45 min
11%
Over 45 min
16%
Housing Stock

Year Built

Before 1940
5%
1940s–1950s
12%
1960s–1970s
11%
1980s–1990s
13%
2000+
59%

Summary

Total Units5,181
Vacant417
Owner Occupied79.8%
Renter Occupied20.2%
Avg HH Size2.34
Frequently Asked Questions
ZIP code 50138 is in Knoxville, IA, in Marion County.
ZIP code 50138 is located in Iowa (IA).
ZIP code 50138 is in Marion County, IA.
ZIP 50138 observes the Chicago timezone. Daylight Saving Time is observed.
The estimated population of ZIP code 50138 is 11,374 people (ACS 2023).
The median household income in ZIP code 50138 is $76,887 (ACS 2023).
The median home value in ZIP 50138 is $169,900 (ACS 2023).
About ZIP Code 50138

ZIP code 50138 is located in Knoxville, Iowa, within Marion County. With a population of 11,374, this is a lightly populated ZIP code with a middle-aged community — the median age is 42.8 years. Economically, 50138 is a middle-income ZIP code: the median household income of $76,887 is near the national average.

Real estate in ZIP code 50138 represents an affordable housing market. The median home value of $169,900 is below the national average. Renters can expect to pay around $815 per month in median rent. Homeownership is strong here — 79.8% of occupied units are owner-occupied, suggesting an established, stable residential community. Median home values have increased by 51% since 2019.

The population of 50138 is primarily White (93.90%). Residents are well-educated — 40.3% hold a bachelor's degree or higher, which is near the national average. Poverty affects a relatively small share of residents at 8.5%. Household income has grown by 37% since 2019.

The unemployment rate in 50138 stands at 2.4%, which is well below the national average. About 11% of workers are remote. As in most parts of the country, driving alone is the dominant commute mode at 78%.

Overall, ZIP code 50138 in Knoxville, IA is characterized as middle-income, well-educated, a middle-aged community, and predominantly owner-occupied. With 11,374 residents, a median household income of $76,887, and a median home value of $169,900, it offers a clear picture of life in this part of Iowa.