Residential delivery area · California
ZIP Code 91733: South El Monte, CA
ZIP code 91733 uses the postal name South El Monte, California and lies entirely in Los Angeles County (Census 2020 ZIP-county file). About 41,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $68,278 (Census Bureau, ACS 2020-2024). By Census place, its land lies in South El Monte (42%) and El Monte (19%), and 1% in smaller places; 38% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- South El Monte · its only residential ZIP
- County
- Los Angeles County
- Census places
- South El Monte (42%); El Monte (19%)
- Metro area
- Los Angeles-Long Beach-Anaheim, CA
- House districts
- CA-31 (61%), CA-38 (39%) 119th Congress, by share of land
- State
- California
- Time zone
- Pacific
- Land area
- 6.7 sq mi · 6,115 people per sq mi
Where is ZIP code 91733?
91733 centers on 34.046°, -118.054° and covers 6.7 square miles of land plus 0.3 of water. It borders 7 ZIP codes: 91770, 91731, 90601, 91732, 91746, 90640, 90660.
The map draws ZIP code areas only. For the streets inside 91733, 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 91733 compare with the rest of Los Angeles County?
| Measure | 91733 | In Los Angeles County | In CA |
|---|---|---|---|
| People (ACS 2020-2024) | 41,255 | 91st of 301 | 365th of 1,802 |
| Median household income | $68k | 221st of 265 | 989th of 1,189 |
| Median home value | $622k | 233rd of 273 | 788th of 1,317 |
Its median household income is higher than in 44% of U.S. residential ZIP codes, and it is denser than 95% 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 91733?
The 2020 Census counted 41,990 people in 91733; the ACS, which samples households over 2020-2024, estimates 41,255. Between the 2010 and 2020 censuses its population fell 4.3% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 41,255
- 2020 Census count
- 41,990−4.3% since 2010 (43,896)
- Households
- 10,922
- Median age
- 38.2
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 91733?
Of the 41,255 people the ACS estimates in 91733, 23.8% are under 18 and 14.1% are 65 or older. The largest group by race and Hispanic origin is Hispanic or Latino (72.4%), then Asian (not Hispanic) (23.4%).
- Under 1823.8%
- 18 to 6462.1%
- 65 and older14.1%
- Hispanic or Latino72.4%
- Asian, not Hispanic23.4%
- White, not Hispanic2.7%
- Other or two or more0.8%
- Black, not Hispanic0.7%
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 91733 earn?
Median household income is $68,278 (ACS 2020-2024), the 221st highest of the 265 ranked ZIP codes in Los Angeles County. It rose from $62,197 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $68,278
- Income per person
- $23,590
- Below the poverty line
- 19.3%
- Unemployed (of the labor force)
- 7.8%
- Adults 25+ with a bachelor's degree
- 11.7%
- Adjusted gross income per tax return, 2022
- $46,36718,380 returns; wages 85% 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 91733?
FHFA's house price index for 91733, built from repeat sales and appraisals of the same homes, rose 81% from 2015 to 2025 and rose 35% from 2020 to 2025, and moved −3.6% in 2025.
- Median home value (owners' estimate)
- $621,800
- Median gross rent
- $1,681
- Homes owned by their occupants
- 41.7%
- Housing units
- 11,279
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 91733?
1,852 business establishments had a location in this ZIP code in 2023, 47 more than in 2018; the most are in wholesale trade (ZIP Code Business Patterns).
- Wholesale trade558
- Manufacturing311
- Retail trade224
- Construction142
- Other services (except public administration)113
- Transportation and warehousing110
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 91733?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 91770 | Rosemead | 58,382 | $75k | 2.1 mi |
| 91731 | El Monte | 27,620 | $62k | 2.3 mi |
| 90601 | Whittier | 30,078 | $104k | 2.9 mi |
| 91732 | El Monte | 57,431 | $75k | 2.9 mi |
| 91746 | La Puente | 28,387 | $87k | 3.8 mi |
| 90640 | Montebello | 61,382 | $80k | 3.9 mi |
| 90660 | Pico Rivera | 60,272 | $88k | 4.4 mi |
| 91755 | Monterey Park | 26,810 | $76k | 3.5 mi (near) |
| 91776 | San Gabriel | 36,952 | $82k | 3.8 mi (near) |
| 91780 | Temple City | 35,588 | $104k | 3.9 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.