ZIP Code 57776 in Redig, SD

Data Last Updated: February 1, 2026
City:Redig, South Dakota
County:Harding County
Timezone:Mountain (GMT -07:00)
Local Time:6:51:51 AM
Population:2 [See All]
Area Code:605
Classification:PO Box
Coordinates:45.2714, -103.5476
Land Area:86.329 sq mi
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57776 Redig, SD - Remote Ranch Country Mail Hub

ZIP Code 57776, Redig

Border Hub
LocationHarding County, SD
Area25.8 sq mi
Population2
Households1
PO Boxes12 Regional Hub (1200%)
Median Age17.0 years (Young)
ZIP CreatedBefore Oct 2004
Key Facts
  • With only 2 census residents and 1 occupied home, Redig is one of South Dakota's smallest ZIP codes
  • The post office maintains 12 PO Boxes for 1 household, showing it serves surrounding ranch territory far beyond the census boundary
  • This is designated as a PO Box Only Zone with no alternative mail delivery across the 26 square mile territory
  • Redig sits at the junction of US Highway 85 and Mason Road in remote Harding County near the Montana border
  • Mixed urban and rural carrier routes serve the area, but isolated ranch locations make PO Box pickup the practical choice

A Crossroads, Not a Town

Redig sits in the remote northwestern corner of South Dakota, where Harding County meets the Montana border. With a census population of just 2 residents and 1 occupied home, this isn't so much a town as a crossroads. US Highway 85 runs north-south through the territory, connecting ranches and homesteads scattered across 26 square miles of high plains grassland.

Mail Service for Surrounding Ranch Territory

The Redig post office maintains 12 PO Boxes for that single household, a ratio that shows its true purpose. This is a regional service point for surrounding ranch country. Families drive in from miles around to collect mail, packages, and supplies. In territory this remote, the post office works as a community anchor, one of the few places neighbors see each other.

PO Box Only Zone

This is a PO Box Only Zone. There's no street delivery across this vast rural territory. The post office does offer limited delivery routes (both city and rural carrier routes serve the area), but most residents rely on PO Boxes because ranch homes sit far from paved roads. Mason Road and US Highway 85 provide the main access routes through the area.

Ranch Country Context

Harding County ranks among South Dakota's most sparsely populated counties. Ranch operations dominate the landscape, with cattle grazing on prairie that looks much as it did a century ago. The area's isolation and low density make centralized mail pickup the only practical solution for postal service.

Mailing to Redig

All mail should be addressed to PO Box numbers:

[Recipient Name]
PO Box [Number]
Redig, SD 57776

Street Name Patterns

Highway Corridor

US Highway 85 provides the main north-south route through remote ranch country.

Interactive charts load automatically as you scroll. Hover for data, click to explore trends, and use the menu to export.

Population & Demographics


ZIP Code 57776 has 2 residents and 1 households (average 2.00 persons per household). The median age is 17.0 years, significantly younger than the state (37.7) and significantly younger than the nation (38.8). The gender split is 50.0% male and 50.0% female, which is about the same as the national male share (49.1%). Largest groups are White (100.0%, much higher than the state average of 80.7% and well above the national average of 61.6%) and Black or African American (0.0%, much lower than the national average of 12.4%); Hispanic or Latino residents make up 0.0%, which is much lower than the national average (18.7%).

Explore More:Population Over TimeBy Age & GenderBy RaceBy GenderNativity & Citizenship

Source: U.S. Census 2020 Demographics & Housing Characteristics (DHC) and U.S. Census 2011-2024 American Community Survey (ACS) 5-Year Estimates.
2020 Population:2Source: Census DHC
2024 ACS Population Estimate:0Source: Census ACS
2026 ZC Population Estimate:0Source: ZIP-Codes.com
Population Density:0.0 people per sq mile
Average Income:$0Source: Census ACS
Households:1Source: Census DHC
Average House Value:$666,666,666Source: Census ACS
Persons Per Household:2.00Source: Census DHC
Average Family Size:1.00Source: Census ACS

Population Over Time (with 2010 & 2020 Census Benchmarks)


Group201020112102201320142015201620172018201920202021202220232024
Census ACS Population Estimate--1111000000000000
Decennial Census15------------------2--------
Source: U.S. Census 2011-2024 American Community Survey 5-Year Estimates. DP05. DEMOGRAPHIC AND HOUSING ESTIMATES

Population by Age & Gender (Total, Male, Female)


Median Age: 17

Male Median Age: 17.5

Female Median Age: 16.5

Group< 55-910-1415-1920-2425-2930-3435-3940-4445-4950-5455-5960-6465-6970-7475-7980-8485+
Male000100000000000000
Female000100000000000000
Total000200000000000000
Source: U.S. Census Bureau (2020) Demographics & Housing Characteristics (DHC)

Population by Race


White:2100.00%
Black:00%
Hispanic:*00%
Asian:00%
American Indian:00%
Hawaiian:00%
Other:00%
Total:2100%
Source: U.S. Census Bureau (2020) Demographics & Housing Characteristics (DHC)
* NOTE: Hispanic or Latino is an ethnicity, not a race. This means individuals who identify as Hispanic will also be included in one of the race categories (such as White or Black). As a result, the totals shown here may exceed 100% when Hispanic is displayed alongside racial groups.

Gender Breakdown


GenderCount%Median Age
Males:150.00%17.5 years
Females:150.00%16.5 years
Total:2100%17.0 years
Source: U.S. Census Bureau (2020) Demographics & Housing Characteristics (DHC)

Nativity & Citizenship


Native, born in the United States:00%
Native, born in PR, Island Areas, or abroad:00%
Foreign born, naturalized U.S. citizen:00%
Foreign born, not a U.S. citizen:00%
Total Population:0100%
Total Native Population:00%
Total Foreign-born Population:00%
Source: U.S. Census 2020-2024 American Community Survey 5-Year Estimates. Table DP02. SELECTED SOCIAL CHARACTERISTICS
Note: Nativity and Citizenship derived from American Community Survey (ACS) 5-year estimates. Total Population listed here will not match official ZIP Code population totals, which are based on the Decennial Census.

Housing & Affordability


In 2024, the median home value is $0, which is much lower than the national median ($332,700), is down $9,999 (100.00%) since 2011 and above its 2019 pre-pandemic level by $0. The median gross rent is $0, which is well under the national median ($1,413), and above its 2019 pre-pandemic level by $0. Insufficient data for owner/renter mix. Insufficient data for vacancy rate.

Explore More:Compare Home ValueHome Value Over TimeRent & Over TimeHousing Occupancy

Source: U.S. Census 2011-2024 American Community Survey 5-Year Estimates. Using data from Table DP03, SELECTED ECONOMIC CHARACTERISTICS.

Median Home Value (Comparison)


Source: U.S. Census 2020-2024 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Median Home Value Over Time


Group20112102201320142015201620172018201920202021202220232024
Median Home Value$9,999$9,999$0$0$0$0$0$0$0$0$0$0$0$0
Source: U.S. Census 2011-2024 American Community Survey 5-Year Estimates. DP04. SELECTED HOUSING CHARACTERISTICS

Gross Rent Paid


Less than $500:00%
$500 to $999:00%
$1,000 to $1,499:00%
$1,500 to $1,999:00%
$2,000 to $2,499:00%
$2,500 to $2,999:00%
$3,000 or more:00%
No Rent:00%
Total:0100%
Source: U.S. Census 2020-2024 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Median Gross Rent Over Time


Group20112102201320142015201620172018201920202021202220232024
Median Rent$0$0$0$0$0$0$0$0$0$0$0$0$0$0
Source: U.S. Census 2011-2024 American Community Survey 5-Year Estimates. DP04. SELECTED HOUSING CHARACTERISTICS

Housing Occupancy


Owner Occupied (with mortgage):00%
Owner Occupied (free and clear, no mortgage):00%
Renter Occupied:00%
Total Occupied Housing Units:0100%

Occupied Housing Units:00%
Vacant Housing Units (not graphed):00%
Total Housing Units:0100%
Source: U.S. Census 2020-2024 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Housing Type (Single-Family, Multi-Family, Other)


Single-Family Units:00%
Multi-Family Units:00%
Other Units:00%
Total Housing Units:0100%
Source: U.S. Census 2020-2024 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Business & Employment Statistics


ZIP Code 57776 is designated for PO Box delivery only; business establishment and employment data are not available.

# Residential Mailboxes:0Source: USPS
# Business Mailboxes:0Source: USPS
Total Delivery Receptacles:11Source: USPS
Single Family Delivery Units:0Source: USPS
Multi Family Delivery Units:0Source: USPS
# of Businesses:0Source: CBP
1st Quarter Payroll:$0Source: CBP
Annual Payroll:$0Source: CBP
# of Employees:0Source: CBP

Geography, Land Area, & Statistical Classifications


ZIP Code 57776 is located in Harding County, South Dakota, within the Metropolitan Statistical Area (CBSA ). This area has a population of 0 people, about 0.00% of whom live in ZIP Code 57776. It covers 86.329 sq mi of land and a water area of 0.241 sq mi.

CBSA Name:--Source: Census
CBSA Number:--Source: Census
CBSA Type:--Source: Census
CBSA Division:--Source: Census
CBSA Population:0Source: Census
MSA:Source: Census
Land Area:86.329 sq miSource: Census
Water Area:0.241 sq miSource: Census
Congressional District:No DistrictsSource: USPS
Congressional Land Area: sq miSource: Census
PMSA:Source: Census
Intro Date:< 2004-10Source: ZIP-Codes.com
Place FIPS Code:--Source: Census
Place Name:--Source: Census

Adjacent & Nearby ZIP Codes


57779 | | 57775

Schools in ZIP Code 57776


We could not locate which school district 57776 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.

Buffalo Elementary - 02 12474 Tipperary St
Buffalo, SD 57720
District: Harding County School District 31-1Nearby
Harding County High School - 01 12474 Tipperary St
Buffalo, SD 57720
District: Harding County School District 31-1Nearby
Harding County Middle School - 03 12474 Tipperary St
Buffalo, SD 57720
District: Harding County School District 31-1Nearby
Camp Crook Elementary - 08 Main St
Camp Crook, SD 57724
District: Harding County School District 31-1Nearby
Newell Elementary - 02 501 Dartmouth Ave
Newell, SD 57760
District: Newell School District 09-2Nearby
Black Hills Christian Academy 630 S 32nd St
Spearfish, SD 57783
District: Private SchoolNearby
St Elizabeth Seton School 2101 City Springs Rd Ste 100
Rapid City, SD 57702
District: Private SchoolNearby
Black Hills Montessori School 305 N 39th St
Rapid City, SD 57702
District: Private SchoolNearby

Colleges & Post Secondary Schools near ZIP Code 57776


Black Hills State University 1200 University St
Spearfish, SD 57799-9500
Type: Post Secondary
Columbia College - Ellsworth AFB 1000 Ellsworth Drive, Suite 1400
Ellsworth AFB, SD 57706-4924
Type: Post Secondary
National American University-Ellsworth 223 Main Gate Rd
Box Elder, SD 57719-2003
Type: Post Secondary
The Salon Professional Academy 937 East North Street
Rapid City, SD 57701
Type: Post Secondary
Paul Mitchell The School-Rapid City 333 Omaha St. Suite 6 & 7
Rapid City, SD 57701
Type: Post Secondary
South Dakota School Of Mines And Technology 501 E Saint Joseph St
Rapid City, SD 57701-3995
Type: Post Secondary

Sources & References


Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.

  1. U.S. Postal Service [Last Updated: 2/1/2026], https://www.usps.com
  2. ZIP-Codes.com Proprietary Data Enhancements [Updated: 2/1/2026], https://www.zip-codes.com
  3. U.S. Census [Updated: Varies], https://www.census.gov
    • U.S. Census Office of Management and Budget [Updated: As Released]
    • U.S. Census 2020 Demographic & Housing Characteristics (DHC) [Decennial] [Updated: 5/25/2023]
    • U.S. Census 2011-2024 American Community Survey 5-year estimates (ACS) [Annually] [Updated: Annually, As Released]
    • U.S. Census Business Patterns (CBD) [Annually] [Updated: Annually, As Released]
    • U.S. Census American National Standards Institute (ANSI) [Updated: As Released]
  4. U.S. Geological Survey [Updated: Varies], https://www.usgs.gov
  5. Centers for Medicare & Medicaid Services [Updated: Annually, As Released], https://www.cms.gov
  6. National Center for Education Statistics [Updated: 2/1/2026], https://nces.ed.gov