Zip code 50138: Knoxville, Iowa

Q: What city is zip code 50138?

50138 is assigned to Knoxville, Iowa. The city name is the one the Postal Service prefers for mail addressed to this zip code.

Q: What county is 50138 in?

50138 is in Marion County, Iowa.

Q: What is the population of 50138?

About 11,117 people live in 50138, according to the Census Bureau's American Community Survey.

Q: What is the median household income in 50138?

The median household income in 50138 is $74,693.

Q: What zip codes are near 50138?

The closest zip codes to 50138 are 50062, 50057, 50119, 50163, 50225.

Residential delivery areaMarion CountyCentral Time

Population

11,117

Median household income

$75K

U.S. $81K

Median home value

$197K

U.S. $333K

Median rent

$815/mo

U.S. $1,413

Median age

42.9

U.S. 38.9

Land area

168 sq mi

66 people/sq mi

Boundary is the Census Bureau's ZIP Code Tabulation Area, which closely tracks the postal delivery area.

About 50138

50138 is a small-town zip code in Knoxville, Iowa (Marion County), covering 168 sq mi of land. About 11,117 people live here, or 66 per square mile. The median resident is 42.9 years old, compared with 38.9 nationally.

The median household earns $74,693 a year, close to the national median of $80,734. 10.5% of residents live below the poverty line (U.S.: 12.5%). A typical home is valued at $196,700, or 2.6 years of median household income (U.S.: 4.1 years), which makes homes relatively affordable for local earners. 81% of occupied homes are lived in by their owners, and renters pay a median of $815 a month.

28% of adults hold a bachelor's degree or higher (U.S.: 36%). Commuters average 23.5 minutes each way, and 10% of workers work from home. The most common jobs among working residents are in production and manufacturing; office and administrative support; and management.

How 50138 compares

Sorted from highest to lowest national percentile

Residents 65 and older22.1%
84th
U.S. 17.2% · IA 18.1%342nd of 911 in IA
Homeownership rate80.9%
80th
StrengthU.S. 65.2% · IA 71.7%510th of 909 in IA
Median age42.9
76th
U.S. 38.9 · IA 38.6433rd of 911 in IA
Housing vacancy9.2%
67th
U.S. 10.1% · IA 8.5%440th of 909 in IA
Tech workers3.5%
61st
U.S. 3.8% · IA 2.9%109th of 911 in IA
Per capita income$41,015
52nd
U.S. $44,673 · IA $40,877320th of 911 in IA
Veterans5.9%
51st
U.S. 6.2% · IA 6.5%575th of 911 in IA
Income inequality (Gini)0.434
50th
U.S. 0.483 · IA 0.444245th of 908 in IA
Median earnings per worker$48,015
49th
U.S. $49,666 · IA $47,712420th of 910 in IA
Self-employed workers9.2%
49th
U.S. 10% · IA 10.2%671st of 911 in IA
Poverty rate10.5%
48th
U.S. 12.5% · IA 11.1%328th of 909 in IA
Median household income$74,693
43rd
U.S. $80,734 · IA $75,059443rd of 896 in IA
Bachelor's degree or higher28%
41st
U.S. 35.7% · IA 31.4%213th of 911 in IA
Average commute23.5 min
33rd
U.S. 26.4 min · IA 19.8 min402nd of 902 in IA
Work from home9.7%
32nd
U.S. 15.1% · IA 11.3%403rd of 911 in IA
Residents under 1819.7%
29th
U.S. 22% · IA 22.9%660th of 911 in IA
Unemployment rate3.7%
28th
U.S. 5.2% · IA 3.6%253rd of 911 in IA
Rent-burdened renters42.6%
22nd
U.S. 51.1% · IA 43.9%291st of 882 in IA
Healthcare workers7.6%
22nd
U.S. 9.7% · IA 9.2%529th of 911 in IA
Median home value$196,700
20th
U.S. $332,700 · IA $208,000284th of 881 in IA
Government workers10.1%
19th
U.S. 14.5% · IA 14.5%658th of 911 in IA
Population11,117
17th
U.S. 334,922,499 · IA 3,210,50774th of 911 in IA
Uninsured rate2.7%
10th
StrengthU.S. 8.4% · IA 5%574th of 911 in IA
Population density66/sq mi
9th
U.S. 95/sq mi · IA 58/sq mi198th of 911 in IA
Broadband access83.3%
9th
WeaknessU.S. 91% · IA 88.9%719th of 909 in IA
Foreign-born residents1.5%
9th
U.S. 14.1% · IA 5.9%385th of 911 in IA
Median gross rent$815
8th
U.S. $1,413 · IA $972403rd of 771 in IA
Diversity index12.6
6th
U.S. 61.4 · IA 31.4479th of 911 in IA

Measure	50138	Marion	IA	U.S.	National percentile	Rank in IA
Residents 65 and older	22.1%	19.4%	18.1%	17.2%	84th	342nd of 911
Homeownership rateStrength	80.9%	77.7%	71.7%	65.2%	80th	510th of 909
Median age	42.9	39.9	38.6	38.9	76th	433rd of 911
Housing vacancy	9.2%	7.4%	8.5%	10.1%	67th	440th of 909
Tech workers	3.5%	3.1%	2.9%	3.8%	61st	109th of 911
Per capita income	$41,015	$40,274	$40,877	$44,673	52nd	320th of 911
Veterans	5.9%	5.7%	6.5%	6.2%	51st	575th of 911
Income inequality (Gini)	0.434	0.433	0.444	0.483	50th	245th of 908
Median earnings per worker	$48,015	$49,239	$47,712	$49,666	49th	420th of 910
Self-employed workers	9.2%	9.1%	10.2%	10%	49th	671st of 911
Poverty rate	10.5%	8.2%	11.1%	12.5%	48th	328th of 909
Median household income	$74,693	$78,680	$75,059	$80,734	43rd	443rd of 896
Bachelor's degree or higher	28%	32.1%	31.4%	35.7%	41st	213th of 911
Average commute	23.5 min	21 min	19.8 min	26.4 min	33rd	402nd of 902
Work from home	9.7%	10.2%	11.3%	15.1%	32nd	403rd of 911
Residents under 18	19.7%	23.1%	22.9%	22%	29th	660th of 911
Unemployment rate	3.7%	2.2%	3.6%	5.2%	28th	253rd of 911
Rent-burdened renters	42.6%	38.2%	43.9%	51.1%	22nd	291st of 882
Healthcare workers	7.6%	8.6%	9.2%	9.7%	22nd	529th of 911
Median home value	$196,700	$233,000	$208,000	$332,700	20th	284th of 881
Government workers	10.1%	12.7%	14.5%	14.5%	19th	658th of 911
Population	11,117	33,642	3,210,507	334,922,499	17th	74th of 911
Uninsured rateStrength	2.7%	2.5%	5%	8.4%	10th	574th of 911
Population density	66/sq mi	61/sq mi	58/sq mi	95/sq mi	9th	198th of 911
Broadband accessWeakness	83.3%	88.4%	88.9%	91%	9th	719th of 909
Foreign-born residents	1.5%	2.1%	5.9%	14.1%	9th	385th of 911
Median gross rent	$815	$884	$972	$1,413	8th	403rd of 771
Diversity index	12.6	12.8	31.4	61.4	6th	479th of 911

The percentile is the share of Americans who live in a zip code with a lower value, so the 50th percentile is typical. Rank 1 is the highest value in the state. Both include zip codes with at least 100 residents. Strengths and weaknesses mark measures in the best or worst fifth nationally, where higher or lower is clearly better (income, poverty, education, commute, broadband, insurance and similar). Measures like age or density are left unmarked.

People

Age

Under 5

15%

5–17

18–24

13%

25–34

11%

35–44

12%

45–54

15%

55–64

12%

65–74

10%

75+

Median age

42.9

Under 18

19.7%

65 and over

22.1%

Race and ethnicity

White93%
Black0.2%
Hispanic2%
Asian1%
Native American0.0%
Pacific Islander0%
Other0.3%
Multiracial3%

Diversity index

12.6

U.S. 61.4

Foreign-born

1.5%

U.S. 14.1%

Born in state

80.4%

Language spoken at home (households)

English only

96%

Spanish

Other Indo-European

Asian / Pacific

0.8%

Other

Households

Households: 4,663
Average household size: 2.3
Family households: 66.3%
Married couples: 56.9%
Living alone: 25.6%
Veterans (of adults): 5.9%
Male / female: 47% / 53%

Income and poverty

Household income distribution

<$25k

15%

$25–50k

18%

$50–75k

17%

$75–100k

13%

$100–150k

20%

$150–200k

10%

$200k+

Median household income

50138

$74,693

Marion Co.

$78,680

Iowa

$75,059

United States

$80,734

Per capita income

$41,015

U.S. $44,673

Poverty rate

10.5%

U.S. 12.5%

Households earning $150K+

16.9%

U.S. 23%

Income inequality (Gini)

0.434

U.S. 0.483

Housing

Median home value

50138

$196,700

Marion Co.

$233,000

Iowa

$208,000

United States

$332,700

Median gross rent

50138

$815

Marion Co.

$884

Iowa

$972

United States

$1,413

Types of housing

Single-family

78%

2–4 units

5–19 units

20+ units

0.4%

Mobile home

Boat, RV, van

0.2%

Housing units: 5,133
Owner-occupied: 80.9%
Vacant: 9.2%
Median year built: 1973
Median rooms: 5.8
Renters paying 30%+ of income: 42.6%
Renters paying 50%+ of income: 14.1%
Home value to income: 2.6× (U.S. 4.1×)

Work and commute

How people get to work

Drove alone

80%

Carpooled

Transit

Walked

0.9%

Bicycle

Worked from home

10%

Other

Commute time (one way)

<10 min

30%

10–19

20%

20–29

21%

30–44

11%

45–59

60+

Average commute

23.5 min

U.S. 26.4 min

Unemployment

3.7%

U.S. 5.2%

In labor force

63.7%

U.S. 63.5%

Jobs and careers

What employed residents do, wherever they work

Occupations

Production

16%

Office and admin

13%

Management

12%

Food service

Transportation and moving

Healthcare

Sales

Construction and repair

Business and finance

Cleaning and personal care

Education

Computer and math

Engineering and science

Legal and social services

Arts, media and sports

Police and fire

0.8%

Farming, fishing and forestry

0.6%

Industries

Manufacturing

25%

Health care and social assistance

16%

Retail

Finance, insurance and real estate

Restaurants and hotels

Education

Other services

Construction

Transportation, warehousing and utilities

Agriculture and mining

Public administration

Information

Professional and technical services

Admin, support and management

Arts and recreation

0.8%

Wholesale

0.3%

Median earnings per worker

$48,015

U.S. $49,666

Self-employed

9.2%

U.S. 10%

Government workers

10.1%

U.S. 14.5%

Nonprofit workers

6.7%

U.S. 8.8%

Median earnings by type of work

Type of work	50138	U.S.
Management, business, science and arts	$63,125	$74,888
Service	$19,194	$26,804
Sales and office	$40,938	$40,476
Construction and maintenance	$65,438	$49,199
Production and transportation	$54,219	$39,989

Education, internet and health coverage

Highest education (adults 25+)

No diploma

High school

36%

Some college

19%

Associate's

11%

Bachelor's

20%

Graduate

High school graduate or higher: 93.3%
Bachelor's degree or higher: 28%
Graduate or professional degree: 7.8%
Households with broadband: 83.3%
Cable, fiber or DSL: 58.2%
No internet access: 11.4%
Without health insurance: 2.7%
Limited-English households: 0%

Geography

City (USPS): Knoxville
State: Iowa
County: Marion County
Center point: 41.3029° N, 93.1077° W
Land area: 168 sq mi
Water area: 7.7 sq mi
Time zone: Central Time (UTC-6, UTC-5 in summer)
Zip type: Residential delivery area

Cities and towns within this zip

Knoxville3% of zip

Census places overlapping the zip's area. Mail may use a different city name than the municipality.

Zip codes near 50138

Search by radius

Zip	City	Distance	Population	IncomeMedian income	Home value
50062	Melcher Dallas, IA	8.5 mi	789	$51,146	$198,100
50057	Columbia, IA	8.6 mi	327	$118,882	$221,300
50119	Harvey, IA	8.7 mi	392	$59,750	$154,200
50163	Melcher Dallas, IA	8.9 mi	689	$73,618	$97,800
50225	Pleasantville, IA	10 mi	3,364	$69,923	$168,500
50116	Hamilton, IA	11 mi	261	$47,143	$168,200
50256	Tracy, IA	11 mi	643	$83,438	$146,800
50214	Otley, IA	12 mi	719	—	$289,700
50044	Bussey, IA	13 mi	901	$75,417	$120,700
50219	Pella, IA	14 mi	14,416	$86,807	$301,400
50150	Lovilia, IA	14 mi	736	$63,516	$124,500
50139	Lacona, IA	15 mi	1,025	$72,400	$151,600

Zip codes like 50138 elsewhere

Matched on income, home values, age, density, education, housing and commuting

Questions about 50138

What city is zip code 50138?

50138 is assigned to Knoxville, Iowa. The city name is the one the Postal Service prefers for mail addressed to this zip code.

What county is 50138 in?

50138 is in Marion County, Iowa.

What is the population of 50138?

About 11,117 people live in 50138, according to the Census Bureau's American Community Survey.

What time zone is 50138 in?

50138 is in Central Time.

What is the median household income in 50138?

The median household income in 50138 is $74,693.

What zip codes are near 50138?

The closest zip codes to 50138 are 50062, 50057, 50119, 50163, 50225.

Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 50138, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.