ZIP Code 91731, California
ZIP Code 91731 profile, demographic data, and geographic information.
ZCTA5 91731 is a 5-digit ZIP Code area located in Los Angeles County, California. As of official census estimates, it has a reported population of 27,620. The land area covers 3.80 sq mi. [1]
Demographics & Population
| Demographic Metric | Estimate / Count | Margin of Error | Survey Period / Source |
|---|---|---|---|
| Total Population | 27,620 | ±1,744 | 2020-2024 / Census ACS 5-Year 2024 |
| Median Age | 36.6 yrs | ±1.5 | 2020-2024 / Census ACS 5-Year 2024 |
| Total Households | 8,293 | ±403 | 2020-2024 / Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).
Housing & Real Estate Profile
| Housing Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Total Housing Units | 8,648 | ±368 |
| Occupied Housing Units | 8,293 | ±403 |
| Vacant Housing Units | 355 | ±143 |
| Median Home Value | $635,600 | ±$22,156 |
| Median Gross Rent | $1,669 | ±$49 |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Economy & Workforce
| Economic Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Median Household Income | $62,215 | ±$4,336 |
| Per Capita Income | $24,216 | ±$1,603 |
| Poverty Rate | 17.8% | ±3.9% |
| Population Below Poverty Level | 4,877 | ±1,121 |
| Unemployment Rate | 6.2% | ±1.5% |
| Civilian Labor Force, Employed | 12,507 | ±967 |
| Broadband Internet Rate | 87.6% | ±1.1% |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Local Government & Public Administration
Authoritative general-purpose local government units serving this area
U.S. Census Bureau GUS (2026) / GMAF
| Government Unit | Unit Type | Jurisdiction Role | Contact / Address |
|---|---|---|---|
|
GUS Population: 9,757,179 (2024)
ID: 123085
|
County | Official County Government |
Contact: EXECUTIVE OFFICER BOARD OF SUPERVISORS
500 W TEMPLE ST, ROOM 383, LOS ANGELES CA 90012
|
Education
Listing 10 local institutions (NCES 2024-2025)
External reference via K12Guides
| Institution | Type | Grades | Location |
|---|---|---|---|
| Alternative School Nearby | 07-12 | Cerritos, CA | |
| Alternative School Nearby | KG-08 | Cerritos, CA | |
| Regular School Nearby | KG-05 | Paramount, CA | |
| Regular School Nearby | KG-06 | La Crescenta, CA | |
| Regular School Nearby | 09-12 | Los Angeles, CA | |
| Regular School Nearby | KG-06 | Fullerton, CA | |
| Regular School Nearby | 06-12 | Highland Park, CA | |
| Regular School Nearby | KG-05 | Walnut Park, CA | |
| Regular School Nearby | KG-08 | Los Angeles, CA | |
| Regular School Nearby | KG-06 | Los Angeles, CA |
Source: k12guides.com.
Community Facilities & Infrastructure
Displaying 10 civic institutions across 2 datasets queried
CMS • IPEDS • IMLS
| Facility Name | Category | Relationship | Address / Location | Contact |
|---|---|---|---|---|
|
University of the West
|
College | 3.2 mi away | 1409 Walnut Grove Ave, Rosemead, CA, 91770 |
6265718811
|
|
SOUTH EL MONTE LIBRARY
|
Library | 2.3 mi away | 1430 N. CENTRAL AVE., SOUTH EL MONTE, CA, 91733 |
(626) 443-4158
|
|
Rio Hondo College
|
College | 4.1 mi away | 3600 Workman Mill Rd, Whittier, CA, 90601-1616 |
5626920921
|
|
SUNKIST LIBRARY
|
Library | 4.1 mi away | 840 NORTH PUENTE AVE., LA PUENTE, CA, 91746 |
(626) 960-2707
|
|
Hacienda La Puente Adult Education
|
College Vocational | 4.4 mi away | 14101 E. Nelson Ave, La Puente, CA, 91746-0002 |
6269342801
|
|
MONTEREY PARK BRUGGEMEYER LIBRARY
|
Library | 4.9 mi away | 318 S. RAMONA AVENUE, MONTEREY PARK, CA, 91754 |
(626) 307-1418
|
|
Latin American Bible Institute
|
College | 4.5 mi away | 14209 East Lomitas Avenue, La Puente, CA, 91746-3099 |
6269681328
|
|
MONTEBELLO LIBRARY
|
Library | 5.8 mi away | 1550 WEST BEVERLY BLVD., MONTEBELLO, CA, 90640 |
(323) 722-6551
|
|
East Los Angeles College
|
College | 6.6 mi away | 1301 Avenida Cesar Chavez, Monterey Park, CA, 91754-6099 |
3232658650
|
|
PICO RIVERA LIBRARY
|
Library | 6.6 mi away | 9001 MINES AVE., PICO RIVERA, CA, 90660 |
(562) 942-7394
|
Distances calculated from authoritative source coordinates. Source: CMS, IMLS, NCES IPEDS.
Climate & Weather Observations
NOAA Monthly Climate Normals
Observation Station: Climate data reflects NOAA 1991–2020 standard normals recorded at SAN GABRIEL FIRE DEPT, CA US, located 3.3 miles from ZCTA5 91731. Local microclimates, topography, and elevation may cause municipal conditions to differ.
| Month | High (°F) | Low (°F) | Mean (°F) | Precip (in) | Snow (in) |
|---|---|---|---|---|---|
| January | 68.6° | 46.1° | 57.4° | 3.56" | 0.0" |
| February | 68.2° | 47.1° | 57.7° | 4.22" | 0.0" |
| March | 70.9° | 50.5° | 60.7° | 2.53" | 0.0" |
| April | 73.8° | 52.7° | 63.2° | 0.61" | 0.0" |
| May | 75.6° | 57.6° | 66.6° | 0.48" | 0.0" |
| June | 80.8° | 61.5° | 71.2° | 0.13" | 0.0" |
| July | 85.5° | 65.2° | 75.4° | 0.04" | 0.0" |
| August | 87.6° | 65.5° | 76.6° | 0.00" | 0.0" |
| September | 86.7° | 63.6° | 75.1° | 0.13" | 0.0" |
| October | 80.7° | 57.4° | 69.0° | 0.61" | 0.0" |
| November | 74.0° | 50.6° | 62.3° | 0.92" | 0.0" |
| December | 67.8° | 45.3° | 56.6° | 2.44" | 0.0" |
Source: NOAA U.S. Climate Normals (1991–2020).
Local Weather Forecast
Weather forecast data is currently unavailable in the local cache.
Nearby Cities & Communities
Listing adjacent communities by spatial proximity (miles)
Proximity discovery
| Community Name | Classification | Distance | Population |
|---|---|---|---|
| El Monte city | City | 0.9 mi | — |
| Temple City city | City | 1.8 mi | — |
| North El Monte CDP | CDP | 2.0 mi | — |
| South El Monte city | City | 2.0 mi | — |
| Rosemead city | City | 2.3 mi | — |
| Mayflower Village CDP | CDP | 3.2 mi | — |
Sources & Data Provenance
- Geographic Classification & Identifiers: U.S. Census Bureau Gazetteer (2026) and TIGER/Line Shapefiles. GEOID: 91731. • Official Source Dataset →
- Socioeconomic & Housing Metrics: U.S. Census Bureau American Community Survey (ACS) 5-year estimates and Population Estimates Program (PEP). Margin of Error (MOE) intervals are reported where published; suppressed values are never estimated or replaced with false zeros.
- Civic Directory Datasets: Centers for Medicare & Medicaid Services (CMS Hospital Directory), National Center for Education Statistics (NCES IPEDS Postsecondary Directory), and Institute of Museum and Library Services (IMLS Public Libraries Survey). Airport landing facilities are provided by airport-data.com.
- Weather & Climate Observations: National Oceanic and Atmospheric Administration (NOAA) U.S. Climate Normals 1991–2020 and National Weather Service (NWS) point forecasts.