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ZIP Code Database - Facts & Stats

Data Last Updated: March 1, 2023

Zip Code 50138, Knoxville, IA

ZIP Code 50138 Details

Zip Code:50138
State:IA [Iowa]
Counties:MARION, IA
Multi County:No
City Alias(es):Knoxville
Area Code:641
City Type:P [Post Office]
Classification: [Non-Unique]
Time Zone:Central (GMT -06:00)
Observes Daylight Saving:Yes
Elevation:791 ft
State FIPS:19
County FIPS:125
Division:West North Central
Intro Date:<2004-10

ZIP Code 50138 2010 Census Demographics

Current Population:11,959
2010 Population:11,720
Households per ZIP Code:4,777
Average House Value:$124,000
Avg. Income Per Household:$58,852
Persons Per Household:2.40
White Population:11,512
Black Population:154
Hispanic Population:194
Asian Population:52
American Indian Population:68
Hawaiian Population:13
Other Population:39
Male Population:5,845
Female Population:5,875
Median Age:41.30 years
Male Median Age:40.20 years
Female Median Age:42.40 years

ZIP Code 50138 Other Demographics

# Residential Mailboxes:4,983
# Business Mailboxes:303
Total Delivery Receptacles:5,504
Number of Businesses:243
1st Quarter Payroll:$36,621,000
Annual Payroll:$152,812,000
# of Employees:3,481
Water Area:7.645 sq mi
Land Area:168.15 sq mi
118th Congressional District:01
118th Congressional Land Area:12048.84 sq mi
Single Family Delivery Units:4,278
Multi Family Delivery Units:497
# Residential Mailboxes:4,983
# Business Mailboxes:303
Total Delivery Receptacles:5,504

ZIP Code 50138 Social Security Benefits

  2018 2019 Delta
Total Beneficiaries: 2,825 2,870 +45
Retired Workers: 2,005 2,045 +40
Disabled Workers: 400 405 +5
Widow(er)s and Parents: 170 170 0
Spouses: 60 60 0
Children: 190 190 0
65+: 2,075 2,115 +40
Monthly Benefits - All: $3,586,000 $3,766,000 +$180,000
Monthly Benefits - Retired Workers: $2,694,000 $2,842,000 +$148,000
Monthly Benefits - Widow(ers): $221,000 $227,000 +$6,000

ZIP Code 50138 Statistical Areas

CBSA: 37800
CBSA Name: Pella, IA
CBSA Type: Micro
CBSA Division: 
CBSA Division Name: 
CBSA Population:33,309
CBSA Division Population:0
MSA Name: 
PMSA Name: 
City State Key:W10807
Preferred Last Line Key:W10807
50137: Previous ZIP Code
Next ZIP Code: 50139


  1. U.S. Postal Service [Last Updated: 3/1/2023],
  2. Internal Data Creation [Last Updated: 3/1/2023],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census American National Standards Institute (ANSI) [Last Updated: 3/1/2023],
  6. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],
  7. Centers for Medicare & Medicaid Services [Updated Yearly],