Fairfax ZIP Codes — Gregory County, SD

There is one unique ZIP code in Fairfax, South Dakota and it is 57335. Area code: 605.
1
ZIP codes
102.75
sq mi land
12.30
sq mi water
605
area code
Fairfax, SD ZIP code map

About Fairfax, SD

Fairfax is a small, charming city located in the state of South Dakota. Nestled within Gregory County, this community offers a blend of rural charm and quiet living. Residents enjoy a peaceful lifestyle surrounded by the beautiful landscapes of the Great Plains.

Location & geography

Geographically, Fairfax is situated approximately 19 miles northwest of Gregory, 27 miles southwest of Wagner, and about 30 miles south of the larger city of Pierre. The city spans a total area of 102.75 square miles, with 12.30 square miles of that area being covered by water. The landscape includes both flat plains and stretches of water, providing a picturesque environment for residents and visitors alike.

Community & economy

The character of Fairfax is marked by its friendly inhabitants and community-oriented atmosphere. Predominantly engaged in agriculture and related industries, the local economy reflects the rural heritage of the area. Daily life in Fairfax typically includes local events, community gatherings, and a strong sense of neighborly support.

Transportation

Fairfax is accessible via South Dakota Highway 18, which connects it to other towns and cities in the region. The nearest major airport is the Pierre Regional Airport, located approximately 30 miles to the northeast, accommodating both passenger and cargo flights. Local transit options are limited, typical for a small community, where most residents rely on personal vehicles.

History

Fairfax was founded in the late 19th century, established during a period of growth in South Dakota. Key industries have historically revolved around agriculture, contributing to the local economy and shaping the town’s development. Over the years, Fairfax has maintained its small-town charm while adapting to the changing dynamics of rural life.

Did you know?

A little-known fact about Fairfax is that it was named after Fairfax County in Virginia, reflecting the influence of early settlers. The community is also recognized for its inclusive and welcoming spirit, often hosting events that celebrate local culture and heritage.

ZIP codes for Fairfax, SD (1)
ZIP code City County Map
57335 Fairfax Gregory View map

Demographics & statistics

227
Population
45.8
Median age
$58,750
Median household income
$29,394
Per capita income
$61,000
Median home value
$0
Median monthly rent
90.2%
Home ownership
15.0%
Poverty rate
3.0%
Unemployment
134
Housing units
21.2%
Bachelor's or higher

Age distribution

Male Female
10
Under 5
16
8
5–9
12
3
10–14
4
2
15–19
4
5
20–24
7
10
25–34
17
5
35–44
9
5
45–54
8
8
55–59
14
6
60–64
9
16
65–74
25
7
75–84
11
2
85+
4
← Male
Female →

Age summary

GroupCount%
Under 185926.0%
18 and over16874.0%
65 and over6528.6%
Median age45.8 years

Race & ethnicity

White 98.2%
Asian 0.9%
Two or more races 0.9%
GroupCount%
White22398.2%
Asian20.9%
Two or more races20.9%

Household income

Under $10k 13.4%
$10k–$15k 3.6%
$15k–$25k 9.8%
$25k–$35k 11.6%
$35k–$50k 7.1%
$50k–$75k 14.3%
$75k–$100k 25.9%
$100k–$150k 9.8%
$150k–$200k 4.5%
Range% of households
Under $10k13.4%
$10k–$15k3.6%
$15k–$25k9.8%
$25k–$35k11.6%
$35k–$50k7.1%
$50k–$75k14.3%
$75k–$100k25.9%
$100k–$150k9.8%
$150k–$200k4.5%
Median income$58,750

Housing

Home values

Under $50k 38.6%
$50k–$100k 23.8%
$100k–$150k 19.8%
$150k–$200k 3.0%
$300k–$500k 9.9%
$500k–$1M 2.0%
$1M+ 3.0%

Housing overview

MetricValue
Median home value$61,000
Median rent / month$0
Owner occupied90.2%
Renter occupied9.8%
Vacant22.8%
Single-family detached71.7%
Large apartment buildings0.0%
Mobile homes26.2%
Median rooms6.0
Avg household size (owned)1.99

Year built

Era%
2020 or later0.7%
2010–201918.6%
2000–20094.8%
1990–19995.5%
1980–198911.7%
1970–197912.4%
1960–19694.8%
1950–19590.7%
1940–19494.8%
1939 or earlier35.9%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom5.5%
2 bedrooms26.2%
3 bedrooms35.9%
4 bedrooms20.7%
5+ bedrooms11.7%

Vehicles per household

Vehicles% of households
No vehicle0.0%
1 vehicle18.8%
2 vehicles33.9%
3 or more47.3%

Heating fuel

Fuel type%
Electricity28.6%
Propane / LP gas58.0%
Fuel oil6.3%
Wood2.7%
No fuel used0.9%

Households & families

Household typeCount%
Married-couple family5145.5%
Cohabiting couple43.6%
Male householder, no spouse108.9%
Female householder, no spouse4742.0%
Households with children under 182421.4%
Households with seniors (65+)5246.4%
Average household size2.03

Marital status

StatusMaleFemale
Never married18.0%17.7%
Married77.0%47.8%
Separated0.0%4.4%
Widowed3.3%23.9%
Divorced1.6%6.2%

Education

Less than 9th grade 1.3%
Some HS, no diploma 8.3%
HS graduate 33.3%
Some college, no degree 23.1%
Associate's degree 12.8%
Bachelor's degree 16.7%
Graduate / professional 4.5%
Metric%
HS diploma or higher90.4%
Bachelor's or higher21.2%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool25.7%
Kindergarten00.0%
Elementary school2365.7%
High school822.9%
College / grad school25.7%

Employment

Industry of employment

Education & healthcare 29.2%
Retail trade 18.8%
Agriculture & mining 17.7%
Other services 11.5%
Transportation & utilities 8.3%
Construction 7.3%
Public administration 3.1%
Arts, food & hospitality 2.1%
Wholesale trade 1.0%
Finance & real estate 1.0%

Occupation

Category%
Management, business & arts32.3%
Service26.0%
Sales & office24.0%
Natural resources & construction13.5%
Production & transportation4.2%

Employment type

Type%
Private sector56.3%
Government16.7%
Self-employed25.0%
Unpaid family workers2.1%

Commute

Method%
Drive alone67.7%
Carpool11.5%
Public transit0.0%
Walk4.2%
Other means1.0%
Avg commute (minutes)39.8

Poverty

All people 15.0%
Under 18 years 13.6%
18 and over 15.5%
Married-couple families 13.7%
Female-led households 50.0%

Income support

Source% of households
Social Security45.5%
Retirement income21.4%
Supplemental Security2.7%
Cash public assistance0.0%
Food stamps / SNAP1.8%

Health indicators

Condition%
High blood pressure38.7%
High cholesterol36.4%
Heart disease9.7%
Stroke4.4%
Asthma9.2%
Arthritis30.5%
Kidney disease4.0%
Pulmonary disease8.4%
Cancer9.4%
Behavior / access%
Binge drinking16.2%
No physical activity27.0%
Less than 7 hrs sleep28.0%
Fair or poor health14.7%
Poor mental health10.1%
Poor physical health11.1%
No health insurance11.7%
Visited doctor (checkup)77.9%
Visited dentist66.1%
Cholesterol screening91.6%
Teeth loss16.4%

Veterans & disability

VeteransCount%
Civilian veterans21.2%
Disability%
Any disability7.9%
Under 183.4%
18–64 years2.9%
65 and over20.0%

Health insurance coverage

Type%
Private insurance78.0%
Public insurance39.2%
Uninsured under 190.0%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only20188.5%
Spanish21.0%
Other Indo-European00.0%
Asian & Pacific Islander00.0%
Other languages21.0%

Place of birth & citizenship

OriginCount%
Native born (US)22599.1%
Born in same state22599.1%
Born in different state15769.2%
Foreign born00.0%
Naturalized citizen20.9%
Not a US citizen00.0%

Ancestry

AncestryCount%
Arab3113.7%
Italian187.9%
French104.4%
AncestryCount%
Polish94%
English83.5%
Dutch31.3%

Technology access

Metric% of households
Computer access49.3%
Internet access83.0%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions
What ZIP codes does Fairfax, SD have?
Fairfax, SD has one ZIP code: 57335. Each ZIP code serves a distinct delivery area within the city and surrounding region.
Need the complete South Dakota ZIP code database? Download all SD ZIP codes — Excel, CSV, or Access. Includes lat/lng, county FIPS & timezone.
Download database →