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ZIP Code Database - Facts & Stats

Data Last Updated: March 1, 2023

Zip Code 51301, Spencer, IA

ZIP Code 51301 Details

Zip Code:51301
State:IA [Iowa]
Counties:CLAY, IA
Multi County:No
City Alias(es):Spencer
Area Code:712
City Type:P [Post Office]
Classification: [Non-Unique]
Time Zone:Central (GMT -06:00)
Observes Daylight Saving:Yes
Elevation:1303 ft
State FIPS:19
County FIPS:041
Division:West North Central
Intro Date:<2004-10

ZIP Code 51301 2010 Census Demographics

Current Population:13,304
2010 Population:12,691
Households per ZIP Code:5,600
Average House Value:$144,100
Avg. Income Per Household:$48,342
Persons Per Household:2.22
White Population:12,337
Black Population:128
Hispanic Population:415
Asian Population:109
American Indian Population:69
Hawaiian Population:4
Other Population:197
Male Population:6,107
Female Population:6,584
Median Age:41.90 years
Male Median Age:39.70 years
Female Median Age:44.20 years

ZIP Code 51301 Other Demographics

# Residential Mailboxes:5,993
# Business Mailboxes:472
Total Delivery Receptacles:7,521
Number of Businesses:488
1st Quarter Payroll:$61,983,000
Annual Payroll:$261,493,000
# of Employees:6,674
Water Area:0.87 sq mi
Land Area:157.668 sq mi
118th Congressional District:04
118th Congressional Land Area:22756.75 sq mi
Single Family Delivery Units:4,788
Multi Family Delivery Units:978
# Residential Mailboxes:5,993
# Business Mailboxes:472
Total Delivery Receptacles:7,521

ZIP Code 51301 Social Security Benefits

  2018 2019 Delta
Total Beneficiaries: 3,165 3,185 +20
Retired Workers: 2,350 2,390 +40
Disabled Workers: 355 360 +5
Widow(er)s and Parents: 225 205 -20
Spouses: 95 85 -10
Children: 140 145 +5
65+: 2,525 2,565 +40
Monthly Benefits - All: $4,180,000 $4,340,000 +$160,000
Monthly Benefits - Retired Workers: $3,288,000 $3,443,000 +$155,000
Monthly Benefits - Widow(ers): $314,000 $302,000 ($12,000)

ZIP Code 51301 Statistical Areas

CBSA: 43980
CBSA Name: Spencer, IA
CBSA Type: Micro
CBSA Division: 
CBSA Division Name: 
CBSA Population:16,667
CBSA Division Population:0
MSA Name: 
PMSA Name: 
City State Key:W11456
Preferred Last Line Key:W11456
51250: Previous ZIP Code
Next ZIP Code: 51331


  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],