PlainZIP

Alpine, CA · standard

ZIP Code 91901

San Diego County, California - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

17,403
75/sq mi
$114,167
Median income
$852,000
Median home value
31.3%
Bachelor's or higher

The verdict

Alpine pairs an upper-quartile household income with top-decile home values, in a rural, homeowner-dominated area.

Top 12%
household income, US ZIPs
Top 4%
home value, US ZIPs
75
people per sq mi
75%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 91901 against every reporting US ZIP.

ZIP code 91901 is a mid-sized community (a standard USPS delivery area) in Alpine, San Diego County, California, home to 17,403 residents across 231.4 square miles, a density of 75 people per square mile, in the Los Angeles time zone.

ZIP 91901 skews affluent, with a median household income of $114,167 (12% above the California average), while per-capita income is $50,579. Local economic indicators show a 12.4% poverty rate alongside 3.7% unemployment. On housing, the median home value is $852,000 (10% above the state average) with median rent at $2,055 per month, and 74.8% of occupied units are owner-occupied.

A solid share of residents have a four-year degree: 31.3% of adults hold a bachelor's degree or higher, the median age is 42.2, and the average commute is 32 minutes. Beyond these figures, 2 nearby ZIP codes within about 10 miles are surfaced below, along with 6 more sharing San Diego County, letting you compare 91901 to its immediate surroundings rather than a national baseline alone.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 91901

Top 5 sectors by establishment count in Alpine, CA

Which industries have the most business establishments in ZIP 91901.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 91901, Alpine, CA · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

17,403

Population

231.4

Area (sq mi)

75

People / sq mi

Los Angeles

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 91901?

42.2

Median Age

50.3%

Male

49.7%

Female

7.1%

Foreign-Born

White 77.5%
African American 1.9%
Asian 1.1%
American Indian or Alaska Native 0.9%
Native Hawaiian or Pacific Islander 0.3%
Two or More Ethnicities 11.9%
Hispanic or Latino 18.8%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$114,167

Median Household Income

+12% vs state

$50,579

Per Capita Income

12.4%

Poverty Rate

3.7%

Unemployment Rate

32.2 min

Mean Commute Time

How ZIP 91901 ranks nationally

Alpine, CA household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$114,167 Top 12% higher than 88% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). This entry sits in this band. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 54.6%
Bachelor's Degree or Higher 31.3%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

6,591

Total Housing Units

6,344

Occupied Units

247

Vacant Units

2.83

Avg Household Size

Occupancy Type

Owner 74.8%
Renter 25.2%

$852,000

Median Home Value

+10% vs state

$2,055

Median Rent

1986

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How have home values changed over time?

FHFA House Price Index, annual appreciation data based on repeat sales and appraisals

+6.2%

YoY Change (2024)

298

HPI Index (2000 = 100)

+198%

Total Change Since 2000

Home values in ZIP 91901 have increased 6.2% over the past year (2024). Since 2000, this ZIP has seen +198% cumulative appreciation.

Year Annual Change HPI Index
2020 +2.1% 204
2021 +15.5% 235
2022 +10.9% 261
2023 +7.6% 281
2024 +6.2% 298

Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.

What businesses operate in this ZIP?

Census Bureau data shows 450 business establishments in ZIP 91901, employing approximately 4,802 people with a combined annual payroll of $254,394,000.

450

Businesses

4,802

Employees

$254.4M

Annual Payroll

14

Industry Sectors

Industry Establishments % of Total
Construction 108 24.0%
Professional, scientific, and technical services 64 14.2%
Retail trade 53 11.8%
Accommodation and food services 39 8.7%
Other services (except public administration) 35 7.8%
Health care and social assistance 33 7.3%
Administrative and support and waste management and remediation services 31 6.9%
Real estate and rental and leasing 26 5.8%
Finance and insurance 16 3.6%
Transportation and warehousing 12 2.7%
Arts, entertainment, and recreation 11 2.4%
Educational services 7 1.6%
Manufacturing 6 1.3%
Information 5 1.1%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 91901 vs 91916 →

ZIP 91901 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 91901 ranks the most populous - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 91901 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 91901 ranks #2 of 3 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
91916 Descanso, CA 1,622 7.7 mi
91935 Jamul, CA 8,624 8.1 mi

More ZIP Codes in San Diego County

91911 standard
Chula Vista, CA
Pop: 82,999
92154 standard
San Diego, CA
Pop: 79,708
91910 standard
Chula Vista, CA
Pop: 75,802
92126 standard
San Diego, CA
Pop: 73,343
92105 standard
San Diego, CA
Pop: 69,813
92114 standard
San Diego, CA
Pop: 65,433

Related Areas

San Diego County Alpine, CA California

Frequently Asked Questions

What county is ZIP code 91901 in? ▼
ZIP code 91901 (Alpine) is located in San Diego County, California. San Diego County contains multiple ZIP codes, see the full list at /counties/san-diego-ca.
What is the population of ZIP code 91901? ▼
ZIP code 91901 in Alpine, CA has a population of 17,403 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 91901? ▼
The median household income in ZIP 91901 is $114,167, which is 50% above the national average of $76,288.
What is the average home value in ZIP 91901? ▼
The median home value in ZIP 91901 is $852,000, which is 206% above the national average of $278,155.
What is the demographic makeup of ZIP 91901? ▼
The largest racial group in ZIP 91901 is White at 77.5%. Hispanic or Latino residents make up 18.8% of the population.
How many businesses are in ZIP code 91901? ▼
ZIP code 91901 has 450 business establishments employing approximately 4,802 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 91901? ▼
The top industries by establishment count in ZIP 91901 are: Construction (108), Professional, scientific, and technical services (64), Retail trade (53). There are 14 industry sectors represented in total.
How have home values changed in ZIP code 91901? ▼
According to the FHFA House Price Index, home values in ZIP 91901 increased by 6.2% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 198%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 91901? ▼
In ZIP code 91901, 54.6% of residents aged 25+ have a high school diploma or higher, and 31.3% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 91901? ▼
The mean commute time for workers in ZIP code 91901 is 32.2 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 91901? ▼
In ZIP code 91901, approximately 74.8% of occupied housing units are owner-occupied and 25.2% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 91901? ▼
The poverty rate in ZIP code 91901 is 12.4% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.