Lakeside (San Diego County) is a community in San Diego County, California, home to about 22,447 people across 6.9 square miles. Its ZIP code is 92040, and parts of 92021 are in Lakeside (San Diego County) too.
Homes sold for a median of $496 per square foot in the three months ending August 2026, a seller’s market.
Mostly Lakeside (San Diego County); also Winter Gardens and Santee
Mostly El Cajon; part is in Lakeside (San Diego County)
Each card is that ZIP code’s whole market, including any part outside Lakeside (San Diego County). Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Lakeside (San Diego County)’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | San Diego International Airport (SAN)18 miles away |
|---|---|
| Nearest city of 250,000+ | San Diego, CA12 miles away |
Straight-line distances from the center of Lakeside (San Diego County); driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Lakeside (San Diego County) had 21,152 residents in the 2020 census, up 8% since 2000.
It’s the 327th largest of 1,563 towns in California by population.
San Diego County grew from 35,090 residents in 1900 to 3,298,634 in 2020.
San Diego County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 89°F in summer, and winter lows average 42°F. About 11.6 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, El Cajon, CA weather station (3 miles away).
1,391,721 jobs at 93,407 businesses in San Diego County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
73 doctors and other health care providers list an office in Lakeside (San Diego County).
Nearest hospitals
Providers with an office here
| Primary care doctors | 8 |
|---|---|
| Specialist doctors | 1 |
| Dentists | 10 |
| Nurse practitioners and physician assistants | 9 |
| Mental health providers | 38 |
| Physical and occupational therapists | 3 |
| Optometrists | 2 |
| Chiropractors | 2 |
| Pharmacies | 5 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (6 nearby)
Grocery stores (3 nearby)
Pharmacies (1 nearby)
Libraries (2 nearby)
Museums
Theaters and performance venues
Counts are within about 2 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Barona Indian Charter District, Lakeside Union Elementary, River Valley Charter District and others. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Barona Indian CharterLakeside | K–8 | 86 | Charter | 7.5 mi |
| DREAM AcademyLakeside | K–8 | 138 | Alternative Education | 3.3 mi |
| Lakeside Farms ElementaryLakeside | K–5 | 667 | Public | 1.5 mi |
| Lakeview ElementaryLakeside | K–5 | 666 | Public | 1.0 mi |
| Lemon Crest ElementaryLakeside | K–5 | 437 | Public | 0.2 mi |
| Lindo Park ElementaryLakeside | K–5 | 421 | Public | 0.8 mi |
| Winter Gardens ElementaryLakeside | K–1 | 269 | Public | 1.3 mi |
| Riverview ElementaryLakeside | 2–5 | 469 | Public | 0.7 mi |
| Lakeside MiddleLakeside | 6–8 | 724 | Public | 1.1 mi |
| Tierra del Sol MiddleLakeside | 6–8 | 713 | Public | 0.6 mi |
| River Valley CharterLakeside | 7–12 | 231 | Charter | 1.1 mi |
| El Capitan HighLakeside | 9–12 | 1,810 | Public | 1.3 mi |
| Lakeside Early Advantage PreschoolLakeside | — | — | Public | 0.8 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Learning AcademyLakeside | Pre-K–4 | 25 | Nonsectarian | 1.6 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with El Cajon, Winter Gardens, Bostonia, Santee, Eucalyptus Hills, Harbison Canyon, Crest and Granite Hills.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.