91978 ZIP Code — Spring Valley, CA

San Diego County, California

ZIP code 91978 is located in Spring Valley, California, within San Diego County. It covers approximately 11.94 square miles and serves a population of 11,006 residents. This is a standard ZIP code in the Pacific (PT) timezone, served by area code 619.

About ZIP code 91978

The housing stock consists of a higher-than-average concentration of mobile homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $528,000. Owner-occupancy sits near the national average at 62%.

Median household income is $95,541. Poverty affects 18% of residents, above the national average.

The dominant occupation class is sales and office, with education and healthcare as the leading industry. The average commute of 26 minutes is near the national average.

Educational attainment is near the national average, with 27% of residents holding a bachelor's degree or higher.

11,006
population
11.94
sq mi land
Standard
ZIP type
Pacific (PT)
timezone
91978 ZIP code map
Cities in ZIP code 91978

Below are the cities the US Postal Service accepts for ZIP code 91978. Using any city not on this list may result in mail delivery delays.

City Status
Spring Valley Preferred
Nearby ZIP codes
91914 Chula Vista (3.3 mi) 91977 Spring Valley (3.5 mi) 91902 Bonita (4.6 mi) 91941 La Mesa (5.3 mi) 91913 Chula Vista (5.6 mi) 91915 Chula Vista (5.9 mi) 91945 Lemon Grove (6 mi) 92139 San Diego (6.4 mi) 92019 El Cajon (6.5 mi) 92114 San Diego (6.5 mi) 92020 El Cajon (6.6 mi) 91942 La Mesa (7.3 mi)
Demographics updated 05/2026
Population
Total population 11,006
Population density 922 / sq mi
State FIPS 06
County FIPS 073
Geography
Land area 11.94 sq mi
Water area 0.03 sq mi
Latitude 32.7019
Longitude -116.9399
Timezone Pacific (PT)
Area code 619
Total population by age
Gender
Race & ethnicity
Economics updated 05/2026
Household income
Income range This ZIP County avg State avg
Under $50k 27.8% 30.1% 32.6%
$50k – $100k 29.5% 28.5% 27.7%
$100k – $200k 35.2% 28.6% 26.4%
Over $200k 7.5% 12.9% 13.3%

Demographics & statistics

11,006
Population
922
People per sq mi
36.7
Median age
$95,541
Median household income
$36,596
Per capita income
$528,000
Median home value
$2,200
Median monthly rent
62.0%
Home ownership
18.4%
Poverty rate
6.7%
Unemployment
2,164
Housing units
27.4%
Bachelor's or higher

Age distribution

Male Female
561
Under 5
539
271
5–9
261
270
10–14
260
355
15–19
341
326
20–24
314
932
25–34
897
820
35–44
788
595
45–54
573
381
55–59
367
282
60–64
272
513
65–74
493
171
75–84
164
133
85+
127
← Male
Female →

Age summary

GroupCount%
Under 182,54223.1%
18 and over8,46476.9%
65 and over1,60114.5%
Median age36.7 years

Race & ethnicity

White 44.6%
Hispanic or Latino 15%
Black or African American 13.8%
Two or more races 13.7%
Other race 7.4%
Asian 4.7%
Native Hawaiian / Pacific Islander 0.8%
American Indian / Alaska Native 0.1%
GroupCount%
White5,76944.6%
Hispanic or Latino1,94015%
Black or African American1,78113.8%
Two or more races1,77513.7%
Other race9577.4%
Asian6094.7%
Native Hawaiian / Pacific Islander1060.8%
American Indian / Alaska Native90.1%

Household income

Income range This ZIP County avg State avg
Under $50k 27.8% 30.1% 32.6%
$50k – $100k 29.5% 28.5% 27.7%
$100k – $200k 35.2% 28.6% 26.4%
Over $200k 7.5% 12.9% 13.3%
Under $10k 1.9%
$10k–$15k 3.7%
$15k–$25k 8.8%
$25k–$35k 2.3%
$35k–$50k 10.3%
$50k–$75k 12.0%
$75k–$100k 13.8%
$100k–$150k 23.8%
$150k–$200k 11.2%
$200k+ 12.3%
Range% of households
Under $10k1.9%
$10k–$15k3.7%
$15k–$25k8.8%
$25k–$35k2.3%
$35k–$50k10.3%
$50k–$75k12.0%
$75k–$100k13.8%
$100k–$150k23.8%
$150k–$200k11.2%
$200k+12.3%
Median income$95,541

Housing

Home values

Under $50k 8.3%
$50k–$100k 13.9%
$100k–$150k 4.8%
$150k–$200k 0.6%
$200k–$300k 0.8%
$300k–$500k 18.3%
$500k–$1M 49.2%
$1M+ 4.1%

Housing overview

MetricValue
Median home value$528,000
Median rent / month$2,200
Owner occupied62.0%
Renter occupied38.0%
Vacant1.7%
Single-family detached46.0%
Large apartment buildings5.1%
Mobile homes22.0%
Median rooms5.3
Avg household size (owned)3.17

Year built

Era%
2020 or later1.5%
2010–20193.0%
2000–200912.5%
1990–19995.0%
1980–198926.1%
1970–197931.5%
1960–196911.0%
1950–19598.1%
1940–19490.7%
1939 or earlier0.5%

Bedrooms

Size% of units
No bedroom (studio)0.6%
1 bedroom3.5%
2 bedrooms31.3%
3 bedrooms40.2%
4 bedrooms21.8%
5+ bedrooms2.6%

Vehicles per household

Vehicles% of households
No vehicle1.2%
1 vehicle22.9%
2 vehicles41.7%
3 or more34.2%

Heating fuel

Fuel type%
Utility gas58.2%
Electricity32.3%
Propane / LP gas1.5%
Solar0.9%
No fuel used7.1%

Households & families

Household typeCount%
Married-couple family1,80353.2%
Cohabiting couple51115.1%
Male householder, no spouse39011.5%
Female householder, no spouse68820.3%
Households with children under 181,25336.9%
Households with seniors (65+)1,05831.2%
Average household size3.23

Marital status

StatusMaleFemale
Never married45.5%36.5%
Married45.7%43.5%
Separated0.8%3.2%
Widowed0.2%4.8%
Divorced7.8%12.1%

Education

Less than 9th grade 3.1%
Some HS, no diploma 5.5%
HS graduate 22.7%
Some college, no degree 29.6%
Associate's degree 11.6%
Bachelor's degree 16.8%
Graduate / professional 10.7%
Metric%
HS diploma or higher91.4%
Bachelor's or higher27.4%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool29911.2%
Kindergarten1023.8%
Elementary school80730.3%
High school56121.0%
College / grad school89833.7%

Employment

Industry of employment

Education & healthcare 23.4%
Retail trade 13.2%
Construction 12.2%
Professional & management 11.0%
Manufacturing 7.1%
Arts, food & hospitality 6.8%
Public administration 6.7%
Transportation & utilities 6.6%
Other services 4.6%
Finance & real estate 4.1%
Wholesale trade 3.4%
Information 0.5%
Agriculture & mining 0.2%

Occupation

Category%
Management, business & arts26.8%
Service23.2%
Sales & office29.6%
Natural resources & construction12.0%
Production & transportation8.4%

Employment type

Type%
Private sector76.1%
Government18.4%
Self-employed5.5%
Unpaid family workers0.0%

Commute

Method%
Drive alone81.0%
Carpool4.7%
Public transit0.9%
Walk0.0%
Work from home11.5%
Other means1.8%
Avg commute (minutes)26.4

Poverty

All people 18.4%
Under 18 years 41.9%
18 and over 11.4%
Married-couple families 8.7%
Female-led households 37.2%

Income support

Source% of households
Social Security30.0%
Retirement income27.6%
Supplemental Security8.2%
Cash public assistance2.9%
Food stamps / SNAP14.3%

Health indicators

Condition%
Obesity29.6%
High blood pressure28.5%
High cholesterol29.0%
Diabetes8.9%
Heart disease5.1%
Stroke2.6%
Asthma9.7%
Arthritis20.6%
Kidney disease2.5%
Pulmonary disease5.6%
Cancer5.6%
Behavior / access%
Smoking12.0%
Binge drinking19.4%
No physical activity19.8%
Less than 7 hrs sleep34.4%
Depression18.4%
Fair or poor health13.7%
Poor mental health15.0%
Poor physical health9.8%
No health insurance11.0%
Visited doctor (checkup)69.6%
Visited dentist67.1%
Cholesterol screening90.7%
Teeth loss9.8%

Veterans & disability

VeteransCount%
Civilian veterans6367.7%
Disability%
Any disability9.8%
Under 183.0%
18–64 years7.3%
65 and over30.8%

Health insurance coverage

Type%
Private insurance58.4%
Public insurance43.5%
No insurance8.2%
Uninsured under 195.1%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only9,90690.0%
Spanish1,76017.8%
Other Indo-European1,23212.4%
Asian & Pacific Islander220.2%
Other languages2452.5%

Place of birth & citizenship

OriginCount%
Native born (US)8,72379.3%
Born in same state8,34375.8%
Born in different state6,51159.2%
Foreign born3803.5%
Naturalized citizen2,28320.7%
Not a US citizen1,69474.2%

Ancestry

AncestryCount%
Italian1,0149.2%
French4514.1%
Arab1171.1%
AncestryCount%
English890.8%
Polish680.6%
Dutch470.4%

Technology access

Metric% of households
Computer access30.8%
Internet access96.7%

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

Frequently asked questions about ZIP code 91978

What city is ZIP code 91978 in?

ZIP code 91978 is primarily assigned to Spring Valley, California.

What county is ZIP code 91978 in?

ZIP code 91978 falls within San Diego County, California.

What is the poverty rate in ZIP code 91978?

18% of residents in ZIP code 91978 live below the poverty line, above the national average.

What is the typical home value in ZIP code 91978?

The median home value in ZIP code 91978 is $528,000.

What is the population of ZIP code 91978?

ZIP code 91978 has an estimated population of 11,006 residents, with a density of 922 people per square mile.

What is the median household income in ZIP code 91978?

The median household income in ZIP code 91978 is $95,541, above the national median of ~$75,000.

What timezone is ZIP code 91978 in?

ZIP code 91978 observes the PST timezone.

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