PlainZIP

Guatay, CA · standard

ZIP Code 91931

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

592
16/sq mi
$63,750
Median income
22.6%
Bachelor's or higher

The verdict

Guatay pairs a below-median household income, in a rural, homeowner-dominated area.

36th pct
household income, US ZIPs
16
people per sq mi
81%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 91931 against every reporting US ZIP.

ZIP code 91931 is a sparsely populated ZIP (a standard USPS delivery area) in Guatay, San Diego County, California, home to just 592 residents across 37.5 square miles, a density of 16 people per square mile, in the Los Angeles time zone.

ZIP 91931 reports a modest median household income of $63,750 (37% below the California average), while per-capita income is $34,239. The poverty rate stands at 3.6% and the unemployment rate at 0.0%. Median home value sits at -, median rent at - a month, and owner-occupancy at 81.4%.

Educational attainment sits below the national norm: 22.6% of adults hold a bachelor's degree or higher, the median age is 65.2, and the average commute is -. We also surface 3 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing San Diego County, so you can benchmark 91931 against its immediate geography rather than a national average 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 →

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 91931, Guatay, 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

592

Population

37.5

Area (sq mi)

16

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 91931?

65.2

Median Age

43.5%

Male

56.5%

Female

19.4%

Foreign-Born

White 54.5%
African American 0.0%
Asian 0.0%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 3.4%
Hispanic or Latino 48.0%

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?

$63,750

Median Household Income

-37% vs state

$34,239

Per Capita Income

3.6%

Poverty Rate

0.0%

Unemployment Rate

How ZIP 91931 ranks nationally

Guatay, CA household income vs. every US ZIP code

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

$63,750 36th percentile higher than 36% 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%). This entry sits in this band. $80,000–$100,000: 5,778 US ZIPs (19%). Above this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $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 32.0%
Bachelor's Degree or Higher 22.6%

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

What does housing look like?

270

Total Housing Units

242

Occupied Units

28

Vacant Units

2.04

Avg Household Size

Occupancy Type

Owner 81.4%
Renter 18.6%

1989

Median Year Built

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

What businesses operate in this ZIP?

Census Bureau data shows 12 business establishments in ZIP 91931, employing approximately 59 people with a combined annual payroll of $3,535,000.

12

Businesses

59

Employees

$3.5M

Annual Payroll

1

Industry Sectors

Industry Establishments % of Total
Construction 4 33.3%

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 91931 vs 91916 →

ZIP 91931 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 91931 ranks #3 by population - useful context the national average alone can't give.

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

ZIP 91931 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 91931 ranks #3 of 4 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 4.7 mi
91948 Mount Laguna, CA 78 6.3 mi
91962 Pine Valley, CA 1,646 6.8 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 Guatay, CA California

Frequently Asked Questions

What county is ZIP code 91931 in? ▼
ZIP code 91931 (Guatay) 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 91931? ▼
ZIP code 91931 in Guatay, CA has a population of 592 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 91931? ▼
The median household income in ZIP 91931 is $63,750, which is 16% below the national average of $76,288.
What is the demographic makeup of ZIP 91931? ▼
The largest racial group in ZIP 91931 is White at 54.5%. Hispanic or Latino residents make up 48.0% of the population.
How many businesses are in ZIP code 91931? ▼
ZIP code 91931 has 12 business establishments employing approximately 59 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 91931? ▼
In ZIP code 91931, 32.0% of residents aged 25+ have a high school diploma or higher, and 22.6% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 91931? ▼
In ZIP code 91931, approximately 81.4% of occupied housing units are owner-occupied and 18.6% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 91931? ▼
The poverty rate in ZIP code 91931 is 3.6% 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.