Browse / United States / California / Alum Rock
Alum Rock
CaliforniaCDP
Total population
10,440
Median home value
$909,500
Bachelor's+
Median income
$126,705
Demographic figures from US Census Bureau · ACS 5-year estimates. Overview below cites Wikipedia and may reference a different year.
- Heat Advisory · ModerateHeat Advisory issued October 1 at 9:43AM PDT until October 4 at 10:00PM PDT by NWS San Francisco CA
Source: NOAA National Weather Service.
City facts
Overview
Situated in California, United States, Alum Rock is a small census-designated community. The population stands at approximately 10,440. The settlement sits at 37.369°, -121.824°, a warm-temperate location in the northern hemisphere. The administrative footprint covers a compact 2.3 km². Resident density is around 4,539 per km², indicating a markedly high population density. Its latitude implies a climate characterised by warm summers and cool winters. Solar-resource estimates put the area at about 1,942 kWh/m² of solar irradiance per year with sunshine for roughly 76% of daylight hours. The remainder of this page draws on open public data to describe the area's demographics, climate, environment and nearby amenities.
Summary composed automatically from structured open data on this page. See our Terms for details.
History & geography
Demographics & economy
Race & ethnicity
Source: US Census Bureau — American Community Survey, 5-year estimates.
Geography
Coordinates & boundaries from the US Census TIGER/Line shapefiles.
Climate
Current forecast
Forecast for Alum Rock, CA from NOAA NWS API.
Air quality
Industrial & pollution facilities
Natural hazard risk
Health (adults)
Age-adjusted prevalence estimates from CDC PLACES (latest release).
Walkability
Amenities nearby
Wildlife & biodiversity
Most-observed species
- House FinchHaemorhous mexicanus (P.L.Statius Müller, 1776) · Aves49,275
- Anna's HummingbirdCalypte anna (R.Lesson, 1829) · Aves47,656
- American CrowCorvus brachyrhynchos C.L.Brehm, 1822 · Aves43,098
- Black PhoebeSayornis nigricans (Swainson, 1827) · Aves42,274
- California TowheeMelozone crissalis (Vigors, 1839) · Aves38,541
- Lesser GoldfinchSpinus psaltria (Say, 1822) · Aves31,339
- Yellow-rumped WarblerSetophaga coronata (Linnaeus, 1766) · Aves30,842
- Mourning DoveZenaida macroura (Linnaeus, 1758) · Aves30,722
Citizen-science & research observations from the Global Biodiversity Information Facility (GBIF).
Schools
Largest nearby schools
- Milpitas HighHigh · Milpitas · 3,026 students · 22.9:1 ratio
- Evergreen Valley HighHigh · San Jose · 2,767 students · 24.3:1 ratio
- Independence HighHigh · San Jose · 2,517 students · 22.1:1 ratio
- Silver Creek HighHigh · San Jose · 2,315 students · 24.6:1 ratio
- Santa Teresa HighHigh · San Jose · 2,196 students · 22.6:1 ratio
- Branham HighHigh · San Jose · 1,990 students · 24.3:1 ratio
- Piedmont Hills HighHigh · San Jose · 1,925 students · 22.9:1 ratio
- Adrian Wilcox HighHigh · Santa Clara · 1,859 students · 20.2:1 ratio
Public K–12 schools within ~10 mi from Urban Institute Education Data Portal (NCES Common Core of Data, 2022).
Earthquake history
Photos
Sights & places nearby
Notable people from here



People born within ~10 km, from Wikidata (CC0). Click any name for their Wikipedia article.
Nearby places in California
- East Foothills1.1 mi away · pop. 7,139
- Los Altos Hills17.3 mi away · pop. 8,377
- Lompico21.6 mi away
- North Fair Oaks22.1 mi away
- Portola Valley22.5 mi away
- La Honda24.1 mi away
- Fairview24.5 mi away · pop. 10,745
- Ben Lomond24.8 mi away · pop. 6,858
- Mount Hermon25.4 mi away
- Felton26.8 mi away · pop. 4,093
- Norris Canyon27.5 mi away
- Pasatiempo27.6 mi away
Geography & sun
Elevation, sunrise/sunset and daylight from Open-Meteo. Solar climatology from NASA POWER.
Nearby airports
Public attention
Pageview totals from the Wikimedia Pageviews API.
Books about Alum Rock

Search results from Open Library.
Recent natural events nearby
- Wildfire GANN, Calaveras, CaliforniaWildfires · 2026-08-03 · 77 mi
- Wildfire Timber, Monterey, CaliforniaWildfires · 2026-08-09 · 80 mi
- Wildfire Plaskett, Monterey, CaliforniaWildfires · 2026-08-26 · 104 mi
- Wildfire DOME, Mariposa, CaliforniaWildfires · 2026-09-15 · 122 mi
- Wildfire FELIZ, Mendocino, CaliforniaWildfires · 2026-08-01 · 134 mi
- Wildfire LUCAS, Lake, CaliforniaWildfires · 2026-09-10 · 144 mi
- Wildfire LUCAS, Lake, CaliforniaWildfires · 2026-09-10 · 144 mi
- Prescribed Fire CRAWFORD CORRAL RX, Tulare, CaliforniaWildfires · 2026-09-19 · 166 mi
Wildfires, storms and other events from NASA EONET (last 12 months, within 250 mi).
Ground air-quality sensors
Recently spotted species
Nearest stream gauge
Events
Gallery
Sources
- • US Census Bureau (ACS 5-year estimates)
- • NOAA National Weather Service
- • Wikidata
- • NCES via Urban Institute Education Data Portal
- • GBIF (Global Biodiversity Information Facility)
- • CDC PLACES
- • Open-Meteo / sunrise-sunset.org
- • Wikipedia Pageviews API
- • Open Library
- • NASA EONET