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ZIP Code Database - Facts & Stats

Data Last Updated: March 1, 2023

Zip Code 51056, Smithland, IA

ZIP Code 51056 Details

Zip Code:51056
State:IA [Iowa]
Multi County:Yes
City Alias(es):Smithland
Area Code:712
City Type:P [Post Office]
Classification: [Non-Unique]
Time Zone:Central (GMT -06:00)
Observes Daylight Saving:Yes
Elevation:1308 ft
State FIPS:19
County FIPS:193
Division:West North Central
Intro Date:<2004-10

ZIP Code 51056 2010 Census Demographics

Current Population:371
2010 Population:478
Households per ZIP Code:206
Average House Value:$72,500
Avg. Income Per Household:$63,857
Persons Per Household:2.32
White Population:472
Black Population:0
Hispanic Population:15
Asian Population:1
American Indian Population:1
Hawaiian Population:0
Other Population:8
Male Population:247
Female Population:231
Median Age:47.40 years
Male Median Age:45.20 years
Female Median Age:50.10 years

ZIP Code 51056 Other Demographics

# Residential Mailboxes:160
# Business Mailboxes:2
Total Delivery Receptacles:309
Number of Businesses:5
1st Quarter Payroll:$375,000
Annual Payroll:$1,748,000
# of Employees:21
Water Area:0.123 sq mi
Land Area:33.594 sq mi
118th Congressional District:04
118th Congressional Land Area:22756.75 sq mi
Single Family Delivery Units:160
Multi Family Delivery Units:0
# Residential Mailboxes:160
# Business Mailboxes:2
Total Delivery Receptacles:309

ZIP Code 51056 Social Security Benefits

  2018 2019 Delta
Total Beneficiaries: 145 135 -10
Retired Workers: 105 105 0
Disabled Workers: 10 10 0
Widow(er)s and Parents: 10 10 0
Spouses: 10 5 -5
Children: 10 5 -5
65+: 115 110 -5
Monthly Benefits - All: $190,000 $185,000 ($5,000)
Monthly Benefits - Retired Workers: $150,000 $155,000 +$5,000
Monthly Benefits - Widow(ers): $13,000 $11,000 ($2,000)

ZIP Code 51056 Statistical Areas

CBSA: 43580
CBSA Name: Sioux City, IA-NE-SD
CBSA Type: Metro
CBSA Division: 
CBSA Division Name: 
CBSA Population:143,577
CBSA Division Population:0
MSA: 7720
MSA Name: Sioux City, IA-NE MSA
PMSA Name: 
City State Key:W11444
Preferred Last Line Key:W11444
51055: Previous ZIP Code
Next ZIP Code: 51058


  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],