91901 ZIP Code — Alpine, CA
San Diego County, California
ZIP code 91901 is located in Alpine, California, within San Diego County. It covers approximately 77.87 square miles and serves a population of 18,669 residents. This is a standard ZIP code in the Pacific (PT) timezone, served by area code 619.
About ZIP code 91901
The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1990s, giving the area an established character. Median home value is $740,000. Owner-occupancy sits near the national average at 73%.
The gap between median ($110,013) and mean household income suggests income inequality — a small number of higher earners pull the average up. 33% 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 29 minutes is near the national average.
Educational attainment is near the national average, with 30% of residents holding a bachelor's degree or higher.
18,669
population
77.87
sq mi land
Standard
ZIP type
Pacific (PT)
timezone
91901 ZIP code map
Cities in ZIP code 91901
Below are the cities the US Postal Service accepts for ZIP code 91901. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Alpine | Preferred |
Nearby ZIP codes
91916 Descanso (8.9 mi)
91935 Jamul (9.6 mi)
92019 El Cajon (9.7 mi)
92021 El Cajon (10.3 mi)
91963 Potrero (11.6 mi)
92040 Lakeside (11.9 mi)
91917 Dulzura (12.3 mi)
91906 Campo (13.4 mi)
91980 Tecate (14.2 mi)
91962 Pine Valley (14.5 mi)
91978 Spring Valley (14.6 mi)
92020 El Cajon (15 mi)
Demographics
updated 06/2026
| Population | |
|---|---|
| Total population | 18,669 |
| Population density | 240 / sq mi |
| State FIPS | 06 |
| County FIPS | 073 |
| Geography | |
|---|---|
| Land area | 77.87 sq mi |
| Water area | 0.69 sq mi |
| Latitude | 32.7899 |
| Longitude | -116.7112 |
| Timezone | Pacific (PT) |
| Area code | 619 |
Total population by age
Gender
Race & ethnicity
Economics
updated 06/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 27.3% | 30.1% | 32.6% |
| $50k – $100k | 25.8% | 28.5% | 27.7% |
| $100k – $200k | 33.2% | 28.6% | 26.4% |
| Over $200k | 13.7% | 12.9% | 13.3% |
Demographics & statistics
18,669
Population
240
People per sq mi
42.0
Median age
$110,013
Median household income
$48,764
Per capita income
$740,000
Median home value
$1,963
Median monthly rent
72.6%
Home ownership
8.8%
Poverty rate
6.3%
Unemployment
4,907
Housing units
29.7%
Bachelor's or higher
Age distribution
Male
Female
463
Under 5
486
541
5–9
569
601
10–14
631
576
15–19
606
573
20–24
603
1,093
25–34
1,149
1,048
35–44
1,101
1,408
45–54
1,481
578
55–59
607
699
60–64
735
894
65–74
941
526
75–84
553
101
85+
106
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 3,982 | 21.3% |
| 18 and over | 14,687 | 78.7% |
| 65 and over | 3,121 | 16.7% |
| Median age | 42.0 years | |
Race & ethnicity
White
71.3%
Hispanic or Latino
10.6%
Two or more races
9.1%
Other race
4.3%
Asian
2.1%
Black or African American
1.4%
American Indian / Alaska Native
0.8%
Native Hawaiian / Pacific Islander
0.4%
| Group | Count | % |
|---|---|---|
| White | 14,889 | 71.3% |
| Hispanic or Latino | 2,214 | 10.6% |
| Two or more races | 1,897 | 9.1% |
| Other race | 906 | 4.3% |
| Asian | 438 | 2.1% |
| Black or African American | 296 | 1.4% |
| American Indian / Alaska Native | 163 | 0.8% |
| Native Hawaiian / Pacific Islander | 80 | 0.4% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 27.3% | 30.1% | 32.6% |
| $50k – $100k | 25.8% | 28.5% | 27.7% |
| $100k – $200k | 33.2% | 28.6% | 26.4% |
| Over $200k | 13.7% | 12.9% | 13.3% |
Under $10k
3.6%
$10k–$15k
1.7%
$15k–$25k
2.5%
$25k–$35k
6.5%
$35k–$50k
4.1%
$50k–$75k
12.3%
$75k–$100k
13.2%
$100k–$150k
24.7%
$150k–$200k
12.3%
$200k+
19.1%
| Range | % of households |
|---|---|
| Under $10k | 3.6% |
| $10k–$15k | 1.7% |
| $15k–$25k | 2.5% |
| $25k–$35k | 6.5% |
| $35k–$50k | 4.1% |
| $50k–$75k | 12.3% |
| $75k–$100k | 13.2% |
| $100k–$150k | 24.7% |
| $150k–$200k | 12.3% |
| $200k+ | 19.1% |
| Median income | $110,013 |
Housing
Home values
Under $50k
1.9%
$50k–$100k
2.7%
$100k–$150k
2.5%
$150k–$200k
0.3%
$200k–$300k
3.0%
$300k–$500k
9.9%
$500k–$1M
65.6%
$1M+
14.1%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $740,000 |
| Median rent / month | $1,963 |
| Owner occupied | 72.6% |
| Renter occupied | 27.4% |
| Vacant | 3.6% |
| Single-family detached | 74.5% |
| Large apartment buildings | 6.2% |
| Mobile homes | 4.5% |
| Median rooms | 5.7 |
| Avg household size (owned) | 2.94 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.0% |
| 2010–2019 | 4.2% |
| 2000–2009 | 11.1% |
| 1990–1999 | 27.3% |
| 1980–1989 | 20.2% |
| 1970–1979 | 20.2% |
| 1960–1969 | 5.4% |
| 1950–1959 | 5.6% |
| 1940–1949 | 2.9% |
| 1939 or earlier | 3.2% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 2.5% |
| 1 bedroom | 5.2% |
| 2 bedrooms | 23.9% |
| 3 bedrooms | 40.6% |
| 4 bedrooms | 21.9% |
| 5+ bedrooms | 5.9% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 3.5% |
| 1 vehicle | 18.3% |
| 2 vehicles | 39.3% |
| 3 or more | 38.9% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 32.4% |
| Electricity | 29.4% |
| Propane / LP gas | 26.6% |
| Wood | 4.8% |
| Solar | 3.2% |
| No fuel used | 1.3% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 3,870 | 60.2% |
| Cohabiting couple | 459 | 7.1% |
| Male householder, no spouse | 858 | 13.4% |
| Female householder, no spouse | 1,238 | 19.3% |
| Households with children under 18 | 2,131 | 33.2% |
| Households with seniors (65+) | 2,010 | 31.3% |
| Average household size | 2.87 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 31.6% | 25.5% |
| Married | 56.6% | 54.7% |
| Separated | 1.3% | 0.6% |
| Widowed | 4.1% | 7.3% |
| Divorced | 6.4% | 11.8% |
Education
Less than 9th grade
1.3%
Some HS, no diploma
3.1%
HS graduate
23.5%
Some college, no degree
33.5%
Associate's degree
8.9%
Bachelor's degree
19.4%
Graduate / professional
10.3%
| Metric | % |
|---|---|
| HS diploma or higher | 95.6% |
| Bachelor's or higher | 29.7% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 139 | 3.4% |
| Kindergarten | 225 | 5.5% |
| Elementary school | 1,826 | 44.5% |
| High school | 943 | 23.0% |
| College / grad school | 969 | 23.6% |
Employment
Industry of employment
Education & healthcare
16.2%
Retail trade
14.9%
Professional & management
13.0%
Construction
10.6%
Manufacturing
9.3%
Arts, food & hospitality
9.0%
Public administration
7.7%
Other services
6.0%
Finance & real estate
5.7%
Transportation & utilities
5.2%
Wholesale trade
1.1%
Information
0.6%
Agriculture & mining
0.5%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 37.8% |
| Service | 19.4% |
| Sales & office | 21.3% |
| Natural resources & construction | 8.5% |
| Production & transportation | 13.1% |
Employment type
| Type | % |
|---|---|
| Private sector | 74.8% |
| Government | 14.7% |
| Self-employed | 10.1% |
| Unpaid family workers | 0.4% |
Commute
| Method | % |
|---|---|
| Drive alone | 84.9% |
| Carpool | 4.1% |
| Public transit | 0.6% |
| Walk | 1.8% |
| Work from home | 8.4% |
| Other means | 0.2% |
| Avg commute (minutes) | 29.2 |
Poverty
All people
8.8%
Under 18 years
10.9%
18 and over
8.2%
Married-couple families
3.9%
Female-led households
7.0%
Income support
| Source | % of households |
|---|---|
| Social Security | 32.8% |
| Retirement income | 29.1% |
| Supplemental Security | 3.2% |
| Cash public assistance | 1.2% |
| Food stamps / SNAP | 5.3% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 28.5% |
| High blood pressure | 29.5% |
| High cholesterol | 31.7% |
| Diabetes | 8.5% |
| Heart disease | 5.5% |
| Stroke | 2.6% |
| Asthma | 9.5% |
| Arthritis | 22.6% |
| Kidney disease | 2.6% |
| Pulmonary disease | 5.9% |
| Cancer | 6.7% |
| Behavior / access | % |
|---|---|
| Smoking | 11.5% |
| Binge drinking | 19.8% |
| No physical activity | 17.4% |
| Less than 7 hrs sleep | 32.6% |
| Depression | 18.8% |
| Fair or poor health | 12.2% |
| Poor mental health | 14.2% |
| Poor physical health | 9.6% |
| No health insurance | 8.3% |
| Visited doctor (checkup) | 70.5% |
| Visited dentist | 71.2% |
| Cholesterol screening | 92.3% |
| Teeth loss | 8.6% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 1,228 | 8.4% |
| Disability | % |
|---|---|
| Any disability | 9.8% |
| Under 18 | 1.7% |
| 18–64 years | 7.9% |
| 65 and over | 27.2% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 74.8% |
| Public insurance | 33.5% |
| No insurance | 4.4% |
| Uninsured under 19 | 2.8% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 17,720 | 94.9% |
| Spanish | 844 | 4.8% |
| Other Indo-European | 585 | 3.3% |
| Asian & Pacific Islander | 32 | 0.2% |
| Other languages | 227 | 1.3% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 17,168 | 92.0% |
| Born in same state | 17,023 | 91.2% |
| Born in different state | 13,030 | 69.8% |
| Foreign born | 145 | 0.8% |
| Naturalized citizen | 1,501 | 8.0% |
| Not a US citizen | 1,049 | 69.9% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| French | 2,362 | 12.7% |
| Italian | 2,241 | 12% |
| Arab | 770 | 4.1% |
| English | 302 | 1.6% |
| Ancestry | Count | % |
|---|---|---|
| Polish | 244 | 1.3% |
| German | 116 | 0.6% |
| Irish | 114 | 0.6% |
| Dutch | 43 | 0.2% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 34.4% |
| Internet access | 98.8% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 91901
What city is ZIP code 91901 in?
ZIP code 91901 is primarily assigned to Alpine, California.
What county is ZIP code 91901 in?
ZIP code 91901 falls within San Diego County, California.
What is the typical home value in ZIP code 91901?
The median home value in ZIP code 91901 is $740,000.
What is the median household income in ZIP code 91901?
The median household income in ZIP code 91901 is $110,013, above the national median of ~$75,000.
What is the population of ZIP code 91901?
ZIP code 91901 has an estimated population of 18,669 residents, with a density of 240 people per square mile.
What timezone is ZIP code 91901 in?
ZIP code 91901 observes the PST timezone.