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ZIP CODE TABULATION AREA

91931

California · 494 residents · 8.205 sq mi
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ZIP 91931 has lower-than-average household income, with a median household income of $63,750. Population has held roughly steady since 2024. 23% of adults hold a bachelor's degree or higher, below the national rate of 36%. With a median age of 65.2, the population is older than the US median of 38.9. Poverty is rare here, at 3.6% of residents. Households here earn about 40% less than the San Diego County median. Among the 97 ZIP codes in San Diego County, 91931 ranks 91st by median household income.

$63,750
US average: $82,259
22.6%
US average: 35.6%
Age, sex & households
Under 18
11.9%
Age 65+
50.8%
43.5%
56.5%
2.04 people
Race & ethnicity · 2024
2024
White, non-Hispanic48.6%(240)
Black0%(0)
Hispanic / Latino48%(237)
Asian0%(0)
Other3.4%(17)
Diversity Score66.6%(329)
Housing
Commute & vehicles
Work & employment
People & community
Affordability & inequality
Within San Diego County
Income rank vs other ZIPs
LOWEST91ST OF 97HIGHEST
Adjacent ZIPs
91901$114,167
91902$122,524
91905$77,886
91906$62,500
Frequently asked

How many people live in ZIP code 91931?

ZIP code 91931 has about 494 residents according to the 2024 American Community Survey.

What is the median household income in ZIP code 91931?

The typical household in ZIP code 91931 earns about $63,750 a year. Half of households make more than that, and half make less.

How educated are people in ZIP code 91931?

About 22.6% of adults age 25 and over in ZIP code 91931 hold a bachelor's degree or higher.

What is the poverty rate in ZIP code 91931?

About 3.6% of people in ZIP code 91931 live below the federal poverty line.

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DATA: US CENSUS BUREAU ACS 5-YEAR · ZCTA · UPDATED 2024