Castleford ZIP Code List — Twin Falls County, ID

There is one unique ZIP code in Castleford, Idaho and it is 83321. Area code: 208.

ZIP codes

181.18

sq mi land

0.14

sq mi water

208

area code

Castleford, ID ZIP code map

About Castleford, ID

Castleford is a small city located in Idaho, known for its serene landscape and close-knit community vibe. Nestled within Twin Falls County, this charming locale is a great representation of small-town life in the Gem State. With its scenic surroundings and simple lifestyle, Castleford offers a unique experience to both residents and visitors alike.

Location & geography

Castleford is situated in the southern part of Idaho, with its land area spanning 181.18 square miles and a small water area of 0.14 square miles. This city is surrounded by several neighboring towns, such as Twin Falls, which is approximately 22 miles to the northeast, and Buhl, about 15 miles to the northwest. The terrain primarily consists of arid landscapes characteristic of southern Idaho, providing stunning views of the surrounding mountains and valleys.

Community & economy

The community of Castleford embodies the essence of rural living with a welcoming atmosphere and strong local ties. The economy here is primarily driven by agriculture, which plays a significant role in daily life and job opportunities. Residents enjoy a laid-back lifestyle, often taking part in local events and gatherings that promote community spirit.

Transportation

Castleford is accessible via several highways, with U.S. Route 30 running nearby, linking it to larger cities in the region. The nearest major airport is Twin Falls Regional Airport, located about 22 miles to the northeast, providing convenient travel options for residents and visitors alike. Public transportation in this area is limited, but the road networks make it easier for residents to commute to surrounding towns.

History

Castleford was founded in the early 1900s and has since maintained its small-town charm. Agriculture has always been a key industry in the region, shaping the community's development and economy over the decades. Although not widely recognized, Castleford holds the history of traditional farming practices and local traditions that are integral to its identity.

Did you know?

One surprising fact about Castleford is its relatively low population density, reflecting its serene and spacious environment. Additionally, the city is recognized for its agricultural significance, specifically in the production of crops that thrive in Idaho's unique climate.

ZIP codes for Castleford, ID (1)

ZIP code	City	County	Map
83321	Castleford	Twin Falls	View map

Demographics & statistics

496

Population

39.8

Median age

$52,262

Median household income

$25,717

Per capita income

$266,700

Median home value

$1,045

Median monthly rent

70.5%

Home ownership

10.5%

Poverty rate

5.1%

Unemployment

166

Housing units

31.5%

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	123	24.8%
18 and over	373	75.2%
65 and over	129	26.0%
Median age	39.8 years

Race & ethnicity

White 55.8%

Hispanic or Latino 19.3%

Two or more races 17.6%

Other race 6.5%

American Indian / Alaska Native 0.8%

Group	Count	%
White	343	55.8%
Hispanic or Latino	119	19.3%
Two or more races	108	17.6%
Other race	40	6.5%
American Indian / Alaska Native	5	0.8%

Household income

Under $10k 3.8%

$10k–$15k 1.0%

$15k–$25k 6.7%

$25k–$35k 8.6%

$35k–$50k 21.0%

$50k–$75k 31.4%

$75k–$100k 12.4%

$100k–$150k 9.0%

$150k–$200k 4.8%

$200k+ 1.4%

Range	% of households
Under $10k	3.8%
$10k–$15k	1.0%
$15k–$25k	6.7%
$25k–$35k	8.6%
$35k–$50k	21.0%
$50k–$75k	31.4%
$75k–$100k	12.4%
$100k–$150k	9.0%
$150k–$200k	4.8%
$200k+	1.4%
Median income	$52,262

Housing

Home values

Under $50k 12.2%

$50k–$100k 7.4%

$100k–$150k 4.7%

$150k–$200k 20.9%

$200k–$300k 6.1%

$300k–$500k 39.2%

$500k–$1M 8.1%

$1M+ 1.4%

Housing overview

Metric	Value
Median home value	$266,700
Median rent / month	$1,045
Owner occupied	70.5%
Renter occupied	29.5%
Vacant	7.9%
Single-family detached	80.3%
Large apartment buildings	0.0%
Mobile homes	19.7%
Median rooms	5.9
Avg household size (owned)	2.16

Year built

Era	%
2020 or later	0.0%
2010–2019	3.1%
2000–2009	20.6%
1990–1999	14.9%
1980–1989	12.7%
1970–1979	27.6%
1960–1969	3.1%
1950–1959	1.3%
1940–1949	8.8%
1939 or earlier	7.9%

Bedrooms

Size	% of units
No bedroom (studio)	0.9%
1 bedroom	4.8%
2 bedrooms	24.6%
3 bedrooms	52.2%
4 bedrooms	13.2%
5+ bedrooms	4.4%

Vehicles per household

Vehicles	% of households
No vehicle	1.9%
1 vehicle	11.0%
2 vehicles	20.0%
3 or more	67.1%

Heating fuel

Fuel type	%
Electricity	71.0%
Propane / LP gas	5.7%
Fuel oil	12.4%
Wood	7.6%

Households & families

Household type	Count	%
Married-couple family	146	69.5%
Cohabiting couple	4	1.9%
Male householder, no spouse	23	11.0%
Female householder, no spouse	37	17.6%
Households with children under 18	66	31.4%
Households with seniors (65+)	91	43.3%
Average household size	2.36

Marital status

Status	Male	Female
Never married	27.6%	10.4%
Married	70.6%	60.4%
Separated	0.9%	1.2%
Widowed	0.0%	11.6%
Divorced	0.9%	16.5%

Education

Less than 9th grade 9.3%

Some HS, no diploma 7.3%

HS graduate 28.7%

Some college, no degree 16.9%

Associate's degree 6.5%

Bachelor's degree 22.5%

Graduate / professional 9.0%

Metric	%
HS diploma or higher	83.4%
Bachelor's or higher	31.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	9	9.2%
Kindergarten	0	0.0%
Elementary school	68	69.4%
High school	16	16.3%
College / grad school	5	5.1%

Employment

Industry of employment

Agriculture & mining 29.8%

Manufacturing 19.0%

Education & healthcare 19.0%

Professional & management 9.8%

Arts, food & hospitality 5.4%

Transportation & utilities 4.4%

Retail trade 2.9%

Wholesale trade 2.4%

Information 2.0%

Finance & real estate 2.0%

Other services 1.5%

Public administration 1.5%

Construction 0.5%

Occupation

Category	%
Management, business & arts	28.8%
Service	8.3%
Sales & office	16.1%
Natural resources & construction	20.0%
Production & transportation	26.8%

Employment type

Type	%
Private sector	84.4%
Government	10.2%
Self-employed	5.4%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	88.8%
Carpool	0.5%
Public transit	0.0%
Walk	0.5%
Other means	1.5%
Avg commute (minutes)	22.4

Poverty

All people 10.5%

Under 18 years 13.0%

18 and over 9.7%

Married-couple families 4.8%

Female-led households 23.1%

Income support

Source	% of households
Social Security	43.3%
Retirement income	30.0%
Supplemental Security	8.1%
Cash public assistance	0.0%
Food stamps / SNAP	5.2%

Health indicators

Condition	%
High blood pressure	29.4%
High cholesterol	27.7%
Heart disease	6.0%
Stroke	2.8%
Asthma	9.1%
Arthritis	21.7%
Kidney disease	2.8%
Pulmonary disease	5.8%
Cancer	6.2%

Behavior / access	%
Binge drinking	14.6%
No physical activity	21.4%
Less than 7 hrs sleep	31.4%
Fair or poor health	13.1%
Poor mental health	12.8%
Poor physical health	10.1%
No health insurance	21.3%
Visited doctor (checkup)	69.1%
Visited dentist	65.1%
Cholesterol screening	85.9%
Teeth loss	13.8%

Veterans & disability

Veterans	Count	%
Civilian veterans	24	6.4%

Disability	%
Any disability	15.7%
Under 18	12.2%
18–64 years	10.7%
65 and over	28.7%

Health insurance coverage

Type	%
Private insurance	73.4%
Public insurance	43.1%
Uninsured under 19	17.2%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	449	90.5%
Spanish	43	9.6%
Other Indo-European	43	9.6%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	456	91.9%
Born in same state	456	91.9%
Born in different state	334	67.3%
Foreign born	0	0.0%
Naturalized citizen	40	8.1%
Not a US citizen	25	62.5%

Ancestry

Ancestry	Count	%
French	52	10.5%
Italian	27	5.4%
Arab	21	4.2%

Ancestry	Count	%
English	11	2.2%
Irish	5	1%
Dutch	2	0.4%

Technology access

Metric	% of households
Computer access	42.3%
Internet access	94.3%

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

Frequently asked questions

What is the ZIP code for Castleford, ID?

Castleford, ID has one ZIP code: 83321.

What is the main ZIP code for Castleford, ID?

The primary ZIP code for Castleford, ID is 83321. The city uses area code 208 for phone service.

What county is Castleford, ID in?

Castleford is located in Twin Falls County, Idaho.

How many ZIP codes are in Castleford, ID?

Castleford, ID has 1 ZIP code.

What is the ZIP code for the downtown area of Castleford, Idaho?

The downtown area of Castleford is located in ZIP code 83321, which serves the entire city in Twin Falls County.

What ZIP code should I use when mailing something to a business in Castleford, ID?

All businesses and residents in Castleford use ZIP code 83321 for mailing addresses in this Twin Falls County community.