92078 ZIP Code — San Marcos, CA

San Diego County, California

ZIP code 92078 is located in San Marcos, California, within San Diego County. It covers approximately 16.70 square miles and serves a population of 53,019 residents. This is a standard ZIP code in the Pacific (PT) timezone, served by area code 760.

About ZIP code 92078

The housing stock consists of a mix of housing types. Most homes were built in the 2000s, giving the area an established character. Median home value is $787,600. Owner-occupancy sits near the national average at 70%.

The gap between median ($107,894) and mean household income suggests income inequality — a small number of higher earners pull the average up. 31% 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. The average commute of 27 minutes is near the national average. Remote work is prevalent — 21% of workers work from home.

Educational attainment is high — 48% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 92078 reflects a community defined by a high rate of remote workers and a significant Social Security-dependent population.

53,019

population

16.70

sq mi land

Standard

ZIP type

Pacific (PT)

timezone

92078 ZIP code map

Cities in ZIP code 92078

Below are the cities the US Postal Service accepts for ZIP code 92078. Using any city not on this list may result in mail delivery delays.

City	Status
San Marcos	Acceptable
San Marcos	Preferred

Nearby ZIP codes

92096 San Marcos (1.3 mi) 92029 Escondido (3.6 mi) 92009 Carlsbad (4.2 mi) 92069 San Marcos (4.6 mi) 92081 Vista (4.8 mi) 92010 Carlsbad (6.2 mi) 92024 Encinitas (6.2 mi) 92084 Vista (6.3 mi) 92083 Vista (6.4 mi) 92091 Rancho Santa Fe (6.9 mi) 92011 Carlsbad (7 mi) 92127 San Diego (7.6 mi)

Demographics updated 05/2026

Population
Total population	53,019
Population density	3,175 / sq mi
State FIPS	06
County FIPS	073

Geography
Land area	16.70 sq mi
Water area	0.12 sq mi
Latitude	33.1226
Longitude	-117.1799
Timezone	Pacific (PT)
Area code	760

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	28.3%	30.1%	32.6%
$50k – $100k	24.2%	28.5%	27.7%
$100k – $200k	31.6%	28.6%	26.4%
Over $200k	15.9%	12.9%	13.3%

Demographics & statistics

53,019

Population

3,175

People per sq mi

37.7

Median age

$107,894

Median household income

$48,866

Per capita income

$787,600

Median home value

$2,274

Median monthly rent

70.2%

Home ownership

8.0%

Poverty rate

4.1%

Unemployment

13,723

Housing units

47.6%

Bachelor's or higher

Age distribution

Male Female

1,748

Under 5

1,725

2,126

5–9

2,098

1,978

10–14

1,953

2,183

15–19

2,154

1,311

20–24

1,295

2,809

25–34

2,772

4,356

35–44

4,301

3,230

45–54

3,189

1,286

55–59

1,270

1,382

60–64

1,364

2,418

65–74

2,386

1,214

75–84

1,198

641

85+

632

← Male

Female →

Age summary

Group	Count	%
Under 18	13,566	25.6%
18 and over	39,453	74.4%
65 and over	8,489	16.0%
Median age	37.7 years

Race & ethnicity

White 55.8%

Hispanic or Latino 14.4%

Two or more races 13.1%

Asian 8.6%

Other race 6.4%

Black or African American 1.2%

American Indian / Alaska Native 0.4%

Native Hawaiian / Pacific Islander 0.1%

Group	Count	%
White	34,576	55.8%
Hispanic or Latino	8,940	14.4%
Two or more races	8,118	13.1%
Asian	5,344	8.6%
Other race	3,944	6.4%
Black or African American	742	1.2%
American Indian / Alaska Native	238	0.4%
Native Hawaiian / Pacific Islander	57	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	28.3%	30.1%	32.6%
$50k – $100k	24.2%	28.5%	27.7%
$100k – $200k	31.6%	28.6%	26.4%
Over $200k	15.9%	12.9%	13.3%

Under $10k 4.2%

$10k–$15k 2.1%

$15k–$25k 4.6%

$25k–$35k 4.1%

$35k–$50k 8.9%

$50k–$75k 10.6%

$75k–$100k 12.1%

$100k–$150k 17.2%

$150k–$200k 11.7%

$200k+ 24.5%

Range	% of households
Under $10k	4.2%
$10k–$15k	2.1%
$15k–$25k	4.6%
$25k–$35k	4.1%
$35k–$50k	8.9%
$50k–$75k	10.6%
$75k–$100k	12.1%
$100k–$150k	17.2%
$150k–$200k	11.7%
$200k+	24.5%
Median income	$107,894

Housing

Home values

Under $50k 0.9%

$50k–$100k 1.2%

$100k–$150k 2.0%

$150k–$200k 2.2%

$200k–$300k 5.0%

$300k–$500k 7.8%

$500k–$1M 50.4%

$1M+ 30.5%

Housing overview

Metric	Value
Median home value	$787,600
Median rent / month	$2,274
Owner occupied	70.2%
Renter occupied	29.8%
Vacant	5.5%
Single-family detached	52.6%
Large apartment buildings	13.6%
Mobile homes	11.5%
Median rooms	5.5
Avg household size (owned)	2.86

Year built

Era	%
2020 or later	1.3%
2010–2019	12.6%
2000–2009	30.6%
1990–1999	16.7%
1980–1989	13.9%
1970–1979	15.1%
1960–1969	8.3%
1950–1959	1.5%
1940–1949	0.0%
1939 or earlier	0.1%

Bedrooms

Size	% of units
No bedroom (studio)	1.5%
1 bedroom	5.9%
2 bedrooms	33.3%
3 bedrooms	30.9%
4 bedrooms	20.4%
5+ bedrooms	7.9%

Vehicles per household

Vehicles	% of households
No vehicle	4.7%
1 vehicle	25.5%
2 vehicles	47.4%
3 or more	22.4%

Heating fuel

Fuel type	%
Utility gas	69.4%
Electricity	24.7%
Propane / LP gas	0.7%
Fuel oil	0.3%
Wood	0.5%
Solar	1.9%
No fuel used	2.0%

Households & families

Household type	Count	%
Married-couple family	10,371	57.5%
Cohabiting couple	786	4.4%
Male householder, no spouse	2,629	14.6%
Female householder, no spouse	4,259	23.6%
Households with children under 18	7,035	39.0%
Households with seniors (65+)	6,033	33.4%
Average household size	2.86

Marital status

Status	Male	Female
Never married	33.4%	24.1%
Married	56.5%	53.8%
Separated	0.6%	2.1%
Widowed	2.0%	8.3%
Divorced	7.5%	11.7%

Education

Less than 9th grade 4.2%

Some HS, no diploma 4.2%

HS graduate 13.9%

Some college, no degree 21.0%

Associate's degree 9.2%

Bachelor's degree 30.2%

Graduate / professional 17.3%

Metric	%
HS diploma or higher	91.6%
Bachelor's or higher	47.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	1,068	6.8%
Kindergarten	792	5.0%
Elementary school	6,330	40.2%
High school	2,552	16.2%
College / grad school	4,994	31.7%

Employment

Industry of employment

Education & healthcare 21.3%

Professional & management 15.3%

Manufacturing 12.1%

Retail trade 11.1%

Arts, food & hospitality 8.3%

Construction 7.0%

Finance & real estate 6.2%

Other services 4.4%

Transportation & utilities 4.1%

Information 3.7%

Public administration 3.3%

Wholesale trade 2.7%

Agriculture & mining 0.7%

Occupation

Category	%
Management, business & arts	49.0%
Service	15.5%
Sales & office	20.5%
Natural resources & construction	7.7%
Production & transportation	7.2%

Employment type

Type	%
Private sector	81.4%
Government	10.1%
Self-employed	8.5%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	70.3%
Carpool	6.0%
Public transit	0.4%
Walk	1.1%
Work from home	20.8%
Other means	1.4%
Avg commute (minutes)	27.1

Poverty

All people 8.0%

Under 18 years 2.6%

18 and over 9.8%

Married-couple families 3.7%

Female-led households 7.5%

Income support

Source	% of households
Social Security	30.6%
Retirement income	22.4%
Supplemental Security	4.6%
Cash public assistance	1.7%
Food stamps / SNAP	5.4%

Health indicators

Condition	%
Obesity	26.8%
High blood pressure	28.2%
High cholesterol	29.5%
Diabetes	8.5%
Heart disease	5.6%
Stroke	2.7%
Asthma	9.1%
Arthritis	21.2%
Kidney disease	2.7%
Pulmonary disease	5.6%
Cancer	6.6%

Behavior / access	%
Smoking	10.2%
Binge drinking	18.5%
No physical activity	19.0%
Less than 7 hrs sleep	32.1%
Depression	17.5%
Fair or poor health	12.9%
Poor mental health	13.8%
Poor physical health	9.3%
No health insurance	10.4%
Visited doctor (checkup)	70.1%
Visited dentist	69.2%
Cholesterol screening	91.2%
Teeth loss	10.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	2,763	7.0%

Disability	%
Any disability	9.9%
Under 18	2.3%
18–64 years	6.7%
65 and over	34.1%

Health insurance coverage

Type	%
Private insurance	76.0%
Public insurance	28.5%
No insurance	6.3%
Uninsured under 19	2.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	49,546	93.4%
Spanish	4,309	8.7%
Other Indo-European	2,873	5.8%
Asian & Pacific Islander	393	0.8%
Other languages	817	1.6%

Place of birth & citizenship

Origin	Count	%
Native born (US)	43,066	81.2%
Born in same state	42,211	79.6%
Born in different state	29,266	55.2%
Foreign born	855	1.6%
Naturalized citizen	9,953	18.8%
Not a US citizen	5,692	57.2%

Ancestry

Ancestry	Count	%
Italian	5,321	10%
French	4,952	9.3%
Arab	1,262	2.4%
Polish	909	1.7%
English	486	0.9%

Ancestry	Count	%
German	423	0.8%
Irish	328	0.6%
Dutch	150	0.3%
Norwegian	136	0.3%

Technology access

Metric	% of households
Computer access	34.0%
Internet access	97.3%

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

Frequently asked questions about ZIP code 92078

What part of San Marcos is ZIP code 92078?

ZIP code 92078 covers a portion of San Marcos, California, within San Diego County.

What county is ZIP code 92078 in?

ZIP code 92078 falls within San Diego County, California.

How educated is the population of ZIP code 92078?

48% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What is the typical home value in ZIP code 92078?

The median home value in ZIP code 92078 is $787,600.

What is the median household income in ZIP code 92078?

The median household income in ZIP code 92078 is $107,894, above the national median of ~$75,000.

What is the population of ZIP code 92078?

ZIP code 92078 has an estimated population of 53,019 residents, with a density of 3,175 people per square mile.

What timezone is ZIP code 92078 in?

ZIP code 92078 observes the PST timezone.