Residential delivery area · California
ZIP Code 91942: La Mesa, CA
ZIP code 91942 is in La Mesa, California, entirely in San Diego County (Census 2020 ZIP-county file). About 41,000 people live there (Census Bureau, ACS 2020-2024), the more populous of La Mesa's 2 residential ZIP codes. Median household income is $92,896 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- La Mesa · 2 residential ZIPs
- County
- San Diego County
- Census places
- La Mesa
- Metro area
- San Diego-Chula Vista-Carlsbad, CA
- House district
- CA-51 119th Congress
- State
- California
- Time zone
- Pacific
- Land area
- 5.8 sq mi · 7,179 people per sq mi
Where is ZIP code 91942?
91942 centers on 32.777°, -117.021° and covers 5.8 square miles of land. It borders 5 ZIP codes: 91941, 92119, 92115, 92020, 92120.
The map draws ZIP code areas only. For the streets inside 91942, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 91942 compare with the rest of La Mesa?
| Measure | 91942 | In La Mesa | In San Diego County | In CA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 41,424 | 1st of 2 | 41st of 116 | 362nd of 1,802 |
| Median household income | $93k | 2nd of 2 | 66th of 85 | 664th of 1,189 |
| Median home value | $776k | 2nd of 2 | 59th of 89 | 603rd of 1,317 |
Its median household income is higher than in 76% of U.S. residential ZIP codes, and it is denser than 96% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 91942?
The 2020 Census counted 40,813 people in 91942; the ACS, which samples households over 2020-2024, estimates 41,424. Between the 2010 and 2020 censuses its population grew 7.2% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 41,424
- 2020 Census count
- 40,813+7.2% since 2010 (38,069)
- Households
- 17,684
- Median age
- 37.7
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 91942?
Of the 41,424 people the ACS estimates in 91942, 20.9% are under 18 and 15.8% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (51.5%), then Hispanic or Latino (27.6%).
- Under 1820.9%
- 18 to 6463.3%
- 65 and older15.8%
- White, not Hispanic51.5%
- Hispanic or Latino27.6%
- Other or two or more7.5%
- Black, not Hispanic7.0%
- Asian, not Hispanic6.4%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 91942 earn?
Median household income is $92,896 (ACS 2020-2024), the 66th highest of the 85 ranked ZIP codes in San Diego County. It rose from $78,638 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $92,896±$9,719
- Income per person
- $49,775
- Below the poverty line
- 12.3%
- Unemployed (of the labor force)
- 6.2%
- Adults 25+ with a bachelor's degree
- 40.9%
- Adjusted gross income per tax return, 2022
- $79,67020,700 returns; wages 76% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 91942?
FHFA's house price index for 91942, built from repeat sales and appraisals of the same homes, rose 103% from 2015 to 2025 and rose 51% from 2020 to 2025, and moved +3.3% in 2025.
- Median home value (owners' estimate)
- $775,700
- Median gross rent
- $2,032
- Homes owned by their occupants
- 45.5%
- Housing units
- 18,607
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 91942?
1,532 business establishments had a location in this ZIP code in 2023, 172 more than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance328
- Retail trade195
- Professional, scientific, and technical services191
- Accommodation and food services153
- Other services (except public administration)145
- Construction117
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 91942?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 91941 | La Mesa | 33,218 | $115k | 1.9 mi |
| 92119 | San Diego | 24,456 | $113k | 2.9 mi |
| 92115 | San Diego | 66,264 | $79k | 3.1 mi |
| 92020 | El Cajon | 57,842 | $76k | 3.3 mi |
| 92120 | San Diego | 31,915 | $121k | 3.3 mi |
| 91945 | Lemon Grove | 27,745 | $88k | 3.1 mi (near) |
| 92182 | San Diego | 0 | – | 3.1 mi (near) |
| 91977 | Spring Valley | 61,064 | $100k | 3.9 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.