Mad River ZIP Codes — Trinity County, CA

There is one unique ZIP code in Mad River, California and it is 95552. Area code: 707.

ZIP codes

136.89

sq mi land

1.71

sq mi water

707

area code

Mad River, CA ZIP code map

About Mad River, CA

Mad River, California, is a small and charming community located in the northern part of the state, nestled within Trinity County. Known for its serene natural beauty and access to outdoor recreational activities, it offers a tranquil escape from urban life. The area attracts visitors who appreciate the stunning landscapes, including the nearby Mad River and surrounding forests.

Location & geography

Situated in a remote region of Northern California, Mad River covers a total area of 136.89 square miles of land, with 1.71 square miles designated as water. The picturesque topography includes lush forests and mountainous terrain, providing plenty of opportunities for hiking, fishing, and camping. Nearby cities include Willow Creek, located approximately 15 miles to the northeast, and Humboldt, which is about 25 miles to the west.

Community & economy

Mad River is characterized by its close-knit community, where residents often interact and engage in local events and activities. The economy is primarily driven by tourism, outdoor recreation, and small-scale agriculture, which support the local lifestyle. Daily life in Mad River revolves around enjoying nature, supporting local businesses, and participating in community gatherings.

Transportation

Access to Mad River is primarily via State Route 299, which connects it to other parts of Trinity County and beyond. The nearest major airport is the Arcata-Eureka Airport, located about 40 miles to the west, providing regional air travel options. Public transit options may be limited, so personal vehicles are the most common mode of transportation in the area.

History

Mad River has a rich history tied to the natural resources of the region, with early settlers drawn to the area for its timber and fishing opportunities. The community has evolved over the years, maintaining a focus on outdoor recreation and sustainable practices. While the exact founding date of the settlement is unclear, it has remained a beloved destination for those seeking solace in nature.

Did you know?

A surprising aspect of Mad River is its untouched natural environment, which offers a peaceful retreat for nature lovers away from bustling tourist spots. Additionally, the Mad River itself is known for quality fishing, attracting angling enthusiasts from various regions during the fishing season.

ZIP codes for Mad River, CA (1)

ZIP code	City	County	Map
95552	Mad River	Trinity	View map

Demographics & statistics

423

Population

65.0

Median age

$21,550

Median household income

$27,487

Per capita income

$240,300

Median home value

$416

Median monthly rent

69.2%

Home ownership

41.6%

Poverty rate

25.9%

Unemployment

467

Housing units

17.3%

Bachelor's or higher

Age distribution

Male Female

5–9

25–34

35–44

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	8	1.9%
18 and over	415	98.1%
65 and over	211	49.9%
Median age	65.0 years

Race & ethnicity

White 100%

Group	Count	%
White	423	100%

Household income

Under $10k 29.5%

$10k–$15k 1.3%

$15k–$25k 23.3%

$25k–$35k 10.1%

$35k–$50k 4.0%

$50k–$75k 8.4%

$75k–$100k 2.6%

$100k–$150k 4.0%

$150k–$200k 14.5%

$200k+ 2.2%

Range	% of households
Under $10k	29.5%
$10k–$15k	1.3%
$15k–$25k	23.3%
$25k–$35k	10.1%
$35k–$50k	4.0%
$50k–$75k	8.4%
$75k–$100k	2.6%
$100k–$150k	4.0%
$150k–$200k	14.5%
$200k+	2.2%
Median income	$21,550

Housing

Home values

$50k–$100k 3.8%

$100k–$150k 9.6%

$150k–$200k 27.4%

$200k–$300k 15.3%

$300k–$500k 30.6%

$500k–$1M 13.4%

Housing overview

Metric	Value
Median home value	$240,300
Median rent / month	$416
Owner occupied	69.2%
Renter occupied	30.8%
Vacant	57.7%
Single-family detached	60.9%
Large apartment buildings	0.0%
Mobile homes	37.6%
Median rooms	3.6
Avg household size (owned)	2.18

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	22.5%
1990–1999	12.1%
1980–1989	18.1%
1970–1979	21.8%
1960–1969	4.5%
1950–1959	9.5%
1940–1949	5.2%
1939 or earlier	6.3%

Bedrooms

Size	% of units
No bedroom (studio)	18.6%
1 bedroom	15.6%
2 bedrooms	42.5%
3 bedrooms	21.8%
4 bedrooms	1.5%
5+ bedrooms	0.0%

Vehicles per household

Vehicles	% of households
No vehicle	1.3%
1 vehicle	35.2%
2 vehicles	41.0%
3 or more	22.5%

Heating fuel

Fuel type	%
Electricity	3.5%
Propane / LP gas	19.8%
Fuel oil	6.2%
Wood	70.5%

Households & families

Household type	Count	%
Married-couple family	133	58.6%
Cohabiting couple	10	4.4%
Male householder, no spouse	60	26.4%
Female householder, no spouse	24	10.6%
Households with children under 18	5	2.2%
Households with seniors (65+)	114	50.2%
Average household size	1.86

Marital status

Status	Male	Female
Never married	28.6%	2.1%
Married	57.9%	76.1%
Separated	0.0%	0.0%
Widowed	2.9%	10.6%
Divorced	10.6%	11.3%

Education

Less than 9th grade 0.0%

Some HS, no diploma 0.7%

HS graduate 34.5%

Some college, no degree 41.9%

Associate's degree 5.5%

Bachelor's degree 16.6%

Graduate / professional 0.7%

Metric	%
HS diploma or higher	99.3%
Bachelor's or higher	17.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	0	0.0%
Elementary school	0	0.0%
High school	0	0.0%
College / grad school	0	0.0%

Employment

Industry of employment

Retail trade 34.9%

Education & healthcare 30.2%

Construction 16.3%

Arts, food & hospitality 11.6%

Agriculture & mining 7.0%

Occupation

Category	%
Management, business & arts	58.1%
Service	0.0%
Sales & office	34.9%
Natural resources & construction	7.0%
Production & transportation	0.0%

Employment type

Type	%
Private sector	34.9%
Government	37.2%
Self-employed	27.9%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	100.0%
Carpool	0.0%
Public transit	0.0%
Walk	0.0%
Other means	0.0%
Avg commute (minutes)	0.0

Poverty

All people 41.6%

Under 18 years 0.0%

18 and over 42.4%

Married-couple families 26.3%

Female-led households 0.0%

Income support

Source	% of households
Social Security	62.6%
Retirement income	35.7%
Supplemental Security	8.8%
Cash public assistance	3.5%
Food stamps / SNAP	7.0%

Health indicators

Condition	%
High blood pressure	41.8%
High cholesterol	39.3%
Heart disease	10.9%
Stroke	5.5%
Asthma	11.9%
Arthritis	34.7%
Kidney disease	4.7%
Pulmonary disease	14.0%
Cancer	8.1%

Behavior / access	%
Binge drinking	15.9%
No physical activity	27.3%
Less than 7 hrs sleep	35.0%
Fair or poor health	24.7%
Poor mental health	16.9%
Poor physical health	17.8%
No health insurance	10.3%
Visited doctor (checkup)	71.0%
Visited dentist	51.6%
Cholesterol screening	91.6%
Teeth loss	19.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	48	11.6%

Disability	%
Any disability	22.7%
Under 18	0.0%
18–64 years	25.5%
65 and over	20.9%

Health insurance coverage

Type	%
Private insurance	52.2%
Public insurance	62.4%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	423	100.0%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	409	96.7%
Born in same state	409	96.7%
Born in different state	280	66.2%
Foreign born	0	0.0%
Naturalized citizen	14	3.3%
Not a US citizen	5	35.7%

Ancestry

Ancestry	Count	%
French	48	11.3%
Arab	39	9.2%

Ancestry	Count	%
Polish	8	1.9%
Italian	3	0.7%

Technology access

Metric	% of households
Computer access	53.7%
Internet access	75.8%

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

Frequently asked questions

What ZIP codes does Mad River, CA have?

Mad River, CA has one ZIP code: 95552. Each ZIP code serves a distinct delivery area within the city and surrounding region.