57335 ZIP Code — Fairfax, SD

Gregory County, South Dakota

ZIP code 57335 is located in Fairfax, South Dakota, within Gregory County. It covers approximately 102.75 square miles and serves a population of 227 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 605.

About ZIP code 57335

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $61,000. Owner-occupancy is high at 90%, well above the national average.

Median household income is $58,750. 46% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. An above-average commute of 40 minutes suggests many residents work outside the immediate area.

Educational attainment is near the national average, with 21% of residents holding a bachelor's degree or higher.

Overall, ZIP code 57335 reflects a community defined by high homeownership and a significant Social Security-dependent population.

227

population

102.75

sq mi land

Standard

ZIP type

Central (CT)

timezone

57335 ZIP code map

Cities in ZIP code 57335

Below are the cities the US Postal Service accepts for ZIP code 57335. Using any city not on this list may result in mail delivery delays.

City	Status
Fairfax	Preferred

Nearby ZIP codes

57356 Lake Andes (9.1 mi) 57342 Geddes (10.3 mi) 68777 Spencer (12.2 mi) 68722 Butte (12.7 mi) 68719 Bristow (14.3 mi) 57317 Bonesteel (16.2 mi)

Demographics updated 05/2026

Population
Total population	227
Population density	2 / sq mi
State FIPS	46
County FIPS	053

Geography
Land area	102.75 sq mi
Water area	12.30 sq mi
Latitude	43.0768
Longitude	-98.7206
Timezone	Central (CT)
Area code	605

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	53.0%	53.1%	41.7%
$50k – $100k	38.1%	30.6%	33.8%
$100k – $200k	9.0%	13.7%	20.1%
Over $200k	0.0%	2.6%	4.4%

Demographics & statistics

227

Population

People per sq mi

45.8

Median age

$58,750

Median household income

$29,394

Per capita income

$61,000

Median home value

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

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	59	26.0%
18 and over	168	74.0%
65 and over	65	28.6%
Median age	45.8 years

Race & ethnicity

White 98.2%

Asian 0.9%

Two or more races 0.9%

Group	Count	%
White	223	98.2%
Asian	2	0.9%
Two or more races	2	0.9%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	53.0%	53.1%	41.7%
$50k – $100k	38.1%	30.6%	33.8%
$100k – $200k	9.0%	13.7%	20.1%
Over $200k	0.0%	2.6%	4.4%

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 $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%
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

Metric	Value
Median home value	$61,000
Median rent / month	$0
Owner occupied	90.2%
Renter occupied	9.8%
Vacant	22.8%
Single-family detached	71.7%
Large apartment buildings	0.0%
Mobile homes	26.2%
Median rooms	6.0
Avg household size (owned)	1.99

Year built

Era	%
2020 or later	0.7%
2010–2019	18.6%
2000–2009	4.8%
1990–1999	5.5%
1980–1989	11.7%
1970–1979	12.4%
1960–1969	4.8%
1950–1959	0.7%
1940–1949	4.8%
1939 or earlier	35.9%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	5.5%
2 bedrooms	26.2%
3 bedrooms	35.9%
4 bedrooms	20.7%
5+ bedrooms	11.7%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	18.8%
2 vehicles	33.9%
3 or more	47.3%

Heating fuel

Fuel type	%
Electricity	28.6%
Propane / LP gas	58.0%
Fuel oil	6.3%
Wood	2.7%
No fuel used	0.9%

Households & families

Household type	Count	%
Married-couple family	51	45.5%
Cohabiting couple	4	3.6%
Male householder, no spouse	10	8.9%
Female householder, no spouse	47	42.0%
Households with children under 18	24	21.4%
Households with seniors (65+)	52	46.4%
Average household size	2.03

Marital status

Status	Male	Female
Never married	18.0%	17.7%
Married	77.0%	47.8%
Separated	0.0%	4.4%
Widowed	3.3%	23.9%
Divorced	1.6%	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 higher	90.4%
Bachelor's or higher	21.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	2	5.7%
Kindergarten	0	0.0%
Elementary school	23	65.7%
High school	8	22.9%
College / grad school	2	5.7%

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 & arts	32.3%
Service	26.0%
Sales & office	24.0%
Natural resources & construction	13.5%
Production & transportation	4.2%

Employment type

Type	%
Private sector	56.3%
Government	16.7%
Self-employed	25.0%
Unpaid family workers	2.1%

Commute

Method	%
Drive alone	67.7%
Carpool	11.5%
Public transit	0.0%
Walk	4.2%
Work from home	15.6%
Other means	1.0%
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 Security	45.5%
Retirement income	21.4%
Supplemental Security	2.7%
Cash public assistance	0.0%
Food stamps / SNAP	1.8%

Health indicators

Condition	%
Obesity	36.1%
High blood pressure	38.7%
High cholesterol	36.4%
Diabetes	12.2%
Heart disease	9.7%
Stroke	4.4%
Asthma	9.2%
Arthritis	30.5%
Kidney disease	4.0%
Pulmonary disease	8.4%
Cancer	9.4%

Behavior / access	%
Smoking	18.7%
Binge drinking	16.2%
No physical activity	27.0%
Less than 7 hrs sleep	28.0%
Depression	15.1%
Fair or poor health	14.7%
Poor mental health	10.1%
Poor physical health	11.1%
No health insurance	11.7%
Visited doctor (checkup)	77.9%
Visited dentist	66.1%
Cholesterol screening	91.6%
Teeth loss	16.4%

Veterans & disability

Veterans	Count	%
Civilian veterans	2	1.2%

Disability	%
Any disability	7.9%
Under 18	3.4%
18–64 years	2.9%
65 and over	20.0%

Health insurance coverage

Type	%
Private insurance	78.0%
Public insurance	39.2%
No insurance	2.2%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	201	88.5%
Spanish	2	1.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	2	1.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	225	99.1%
Born in same state	225	99.1%
Born in different state	157	69.2%
Foreign born	0	0.0%
Naturalized citizen	2	0.9%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Arab	31	13.7%
Italian	18	7.9%
French	10	4.4%

Ancestry	Count	%
Polish	9	4%
English	8	3.5%
Dutch	3	1.3%

Technology access

Metric	% of households
Computer access	49.3%
Internet access	83.0%

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

Frequently asked questions about ZIP code 57335

What city is ZIP code 57335 in?

ZIP code 57335 is primarily assigned to Fairfax, South Dakota.

What county is ZIP code 57335 in?

ZIP code 57335 falls within Gregory County, South Dakota.

Does ZIP code 57335 have an older population?

29% of residents in ZIP code 57335 are 65 or older, above the national average of ~17%.

Is ZIP code 57335 mostly owner-occupied?

90% of occupied units in ZIP code 57335 are owner-occupied, well above the national average.

Does ZIP code 57335 have a large retiree population?

46% of households in ZIP code 57335 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 57335?

The median home value in ZIP code 57335 is $61,000.

What timezone is ZIP code 57335 in?

ZIP code 57335 observes the CST timezone.