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ZIP Code Database - Facts & Stats

Data Last Updated: March 1, 2023

Zip Code 57751, Keystone, SD

ZIP Code 57751 Details

Zip Code:57751
State:SD [South Dakota]
Multi County:No
City Alias(es):Keystone
Area Code:605
City Type:P [Post Office]
Classification: [Non-Unique]
Time Zone:Mountain (GMT -07:00)
Observes Daylight Saving:Yes
Elevation:4642 ft
State FIPS:46
County FIPS:103
Division:West North Central
Intro Date:<2004-10

ZIP Code 57751 2010 Census Demographics

Current Population:736
2010 Population:844
Households per ZIP Code:375
Average House Value:$265,200
Avg. Income Per Household:$75,893
Persons Per Household:2.24
White Population:815
Black Population:2
Hispanic Population:31
Asian Population:6
American Indian Population:39
Hawaiian Population:1
Other Population:1
Male Population:426
Female Population:418
Median Age:50.60 years
Male Median Age:51.70 years
Female Median Age:47.40 years

ZIP Code 57751 Other Demographics

# Residential Mailboxes:329
# Business Mailboxes:49
Total Delivery Receptacles:510
Number of Businesses:73
1st Quarter Payroll:$1,587,000
Annual Payroll:$12,959,000
# of Employees:274
Water Area:0.005 sq mi
Land Area:44.223 sq mi
118th Congressional District:
118th Congressional Land Area: sq mi
Single Family Delivery Units:305
Multi Family Delivery Units:8
# Residential Mailboxes:329
# Business Mailboxes:49
Total Delivery Receptacles:510

ZIP Code 57751 Social Security Benefits

  2018 2019 Delta
Total Beneficiaries: 210 215 +5
Retired Workers: 170 175 +5
Disabled Workers: 20 15 -5
Widow(er)s and Parents: 15 15 0
Spouses: 0 5 +5
Children: 5 5 0
65+: 170 180 +10
Monthly Benefits - All: $291,000 $307,000 +$16,000
Monthly Benefits - Retired Workers: $241,000 $256,000 +$15,000
Monthly Benefits - Widow(ers): $20,000 $21,000 +$1,000

ZIP Code 57751 Statistical Areas

CBSA: 39660
CBSA Name: Rapid City, SD
CBSA Type: Metro
CBSA Division: 
CBSA Division Name: 
CBSA Population:126,382
CBSA Division Population:0
MSA: 6660
MSA Name: Rapid City, SD MSA
PMSA Name: 
City State Key:W1A838
Preferred Last Line Key:W1A838
57750: Previous ZIP Code
Next ZIP Code: 57752


  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],