ZIP Code 91931, California
ZIP Code 91931 profile, demographic data, and geographic information.
ZCTA5 91931 is a 5-digit ZIP Code area located in San Diego County, California. As of official census estimates, it has a reported population of 494. The land area covers 8.20 sq mi. [1]
Demographics & Population
| Demographic Metric | Estimate / Count | Margin of Error | Survey Period / Source |
|---|---|---|---|
| Total Population | 494 | ±374 | 2020-2024 / Census ACS 5-Year 2024 |
| Median Age | 65.2 yrs | ±67.9 | 2020-2024 / Census ACS 5-Year 2024 |
| Total Households | 242 | ±173 | 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 | 270 | ±193 |
| Occupied Housing Units | 242 | ±173 |
| Vacant Housing Units | 28 | ±44 |
| Median Home Value | Suppressed | — |
| Median Gross Rent | Suppressed | — |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Economy & Workforce
| Economic Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Median Household Income | $63,750 | ±$38,725 |
| Per Capita Income | $34,239 | ±$22,857 |
| Poverty Rate | 3.6% | ±4.7% |
| Population Below Poverty Level | 18 | ±27 |
| Unemployment Rate | 0% | ±7.6% |
| Civilian Labor Force, Employed | 184 | ±186 |
| Broadband Internet Rate | 83.1% | ±31.8% |
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: 3,298,799 (2024)
ID: 161111
|
County | Official County Government |
Contact: HUMAN RESOURCES
5530 OVERLAND AVE, STE 210, SAN DIEGO CA 92123-1204
|
Education
Listing 10 local institutions (NCES 2024-2025)
External reference via K12Guides
| Institution | Type | Grades | Location |
|---|---|---|---|
| Regular School Nearby | KG-06 | Ramona, CA | |
| Regular School Nearby | 01-05 | Alpine, CA | |
| Regular School Nearby | KG-06 | Campo, CA | |
| Alternative School Nearby | 07-12 | Pine Valley, CA | |
| Regular School Nearby | KG | Alpine, CA | |
| Regular School Nearby | KG-06 | Descanso, CA | |
| Alternative School Nearby | 07-12 | Pine Valley, CA | |
| Regular School Nearby | KG-12 | Pine Valley, CA | |
| Regular School Nearby | KG-06 | Ramona, CA | |
| Regular School Nearby | 06-08 | Alpine, 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 |
|---|---|---|---|---|
|
Southern California Seminary
|
College | 19.1 mi away | 2075 E. Madison Avenue, El Cajon, CA, 92019-1108 |
6192018999
|
|
DESCANSO LIBRARY
|
Library | 2.5 mi away | 9545 RIVER DRIVE, DESCANSO, CA, 91916 |
(619) 445-5279
|
|
Bellus Academy-El Cajon
|
College | 21.5 mi away | 1073 E Main St, El Cajon, CA, 92021 |
6194423407
|
|
PINE VALLEY LIBRARY
|
Library | 3.0 mi away | 28804 OLD HIGHWAY 80, PINE VALLEY, CA, 91962 |
(619) 473-8022
|
|
Cuyamaca College
|
College | 22.0 mi away | 900 Rancho San Diego Pky, El Cajon, CA, 92019 |
6196604000
|
|
ALPINE LIBRARY
|
Library | 11.4 mi away | 1752 ALPINE BOULEVARD, ALPINE, CA, 91901 |
(619) 445-4221
|
|
San Diego Christian College
|
College | 23.1 mi away | 280 Riverview Parkway, Santee, CA, 92071 |
6192018700
|
|
POTRERO LIBRARY
|
Library | 15.8 mi away | 24883 POTRERO VALLEY ROAD, POTRERO, CA, 91963 |
(619) 478-5978
|
|
ATA College
|
College | 23.3 mi away | 1810 Gillespie Way, Suite 104, El Cajon, CA, 92020 |
6195962766
|
|
CAMPO-MORENA VILLAGE LIBRARY
|
Library | 16.0 mi away | 31356 HIGHWAY 94, CAMPO, CA, 91906 |
(619) 478-5945
|
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 MT LAGUNA #3, CA US, located 9.6 miles from ZCTA5 91931. Local microclimates, topography, and elevation may cause municipal conditions to differ.
| Month | High (°F) | Low (°F) | Mean (°F) | Precip (in) | Snow (in) |
|---|---|---|---|---|---|
| January | 50.2° | 33.2° | 41.7° | 2.69" | — |
| February | 49.9° | 33.9° | 41.9° | 4.82" | — |
| March | 54.3° | 36.2° | 45.2° | 2.59" | — |
| April | 61.1° | 39.9° | 50.5° | 0.90" | — |
| May | 68.1° | 45.7° | 56.9° | 0.40" | — |
| June | 77.7° | 53.0° | 65.3° | 0.08" | — |
| July | 82.6° | 59.7° | 71.2° | 0.75" | — |
| August | 82.0° | 58.4° | 70.2° | 0.49" | — |
| September | 76.2° | 53.6° | 64.9° | 0.53" | — |
| October | 66.8° | 45.2° | 56.0° | 0.70" | — |
| November | 56.6° | 38.1° | 47.3° | 1.39" | — |
| December | 50.6° | 33.8° | 42.2° | 2.30" | — |
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 |
|---|---|---|---|
| Descanso CDP | CDP | 3.5 mi | — |
| Pine Valley CDP | CDP | 4.0 mi | — |
| Mount Laguna CDP | CDP | 9.3 mi | — |
| Alpine CDP | CDP | 10.2 mi | — |
| Campo CDP | CDP | 14.9 mi | — |
| Harbison Canyon CDP | CDP | 15.0 mi | — |
Sources & Data Provenance
- Geographic Classification & Identifiers: U.S. Census Bureau Gazetteer (2026) and TIGER/Line Shapefiles. GEOID: 91931. • 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.