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City · San Diego County

El Cajon
A local perspective.

Discover the places, stories, and people connected to El Cajon.

Main Street in El Cajon, in a source image dated June 23, 2007.
Main Street in El Cajon, in a source image dated June 23, 2007. · Source image date: 2007-06-23 (source record) Allan Ferguson · CC BY 2.0 · Source-provided JPEG display derivative; resized for display; original linked at source.

Get to know El Cajon.

El Cajon is a city, San Diego County, California.

CountySan Diego County
Land area37.6 km²
Map locationExplore the area ↗

El Cajon: two historic homes that tell different stories of the city

A stopping place on a longer journey

The Historical Society’s Knox House history connects the 1876 hotel with travel between San Diego and Julian after the discovery of gold. Teamsters, miners and drovers needed a place to stop where the road turned toward the mountains. That practical need helps explain how a hotel and family residence became part of the developing town’s commercial life.

A house can move while keeping its history

The museum’s account follows the building through several relocations, including the City’s purchase and move in 1972. The museum interprets domestic life around 1895–1912. Its rooms offer a different scale of history from a citywide timeline: furnishings and household spaces make the routines of a family and its business easier to imagine.

An artist’s home became a community project

The Wieghorst Museum’s founding history describes how friends of painter Olaf Wieghorst developed the idea for a museum after his death. Donations, loans, a foundation and local organizing gradually turned the proposal into a working institution. The account makes preservation a story about relationships and persistence as well as the accomplishments of one artist.

Art, a house and a garden share a downtown setting

The museum history records the home’s relocation in 1999 and the adaptation of a neighboring building for gallery use. The restored house, museum galleries and botanical garden now provide complementary ways to encounter Wieghorst’s legacy. Check the museum’s current visitor information for exhibitions and tours; the founding account explains how the place came together, rather than serving as an event calendar.

Editorial review: 2026-11-08

Community details

USGS topographic map
El Cajon Source ↗
USGS geographic name ID
1652701 Source ↗
Population
106,215 (2020 Census geography) Source ↗
Housing units
36,749 (2020 Census geography) Source ↗
Median owner-occupied home value (survey estimate)
$681,700 ± $18,389 (2020–2024 ACS 5-year) Source ↗
Median monthly gross rent (survey estimate)
$1,856 ± $27 (2020–2024 ACS 5-year) Source ↗
Households (survey estimate)
33,890 ± 848 (2020–2024 ACS 5-year) Source ↗
Owner-occupied households (survey estimate)
14,066 ± 770 (2020–2024 ACS 5-year) Source ↗
Renter-occupied households (survey estimate)
19,824 ± 793 (2020–2024 ACS 5-year) Source ↗
Land area (2020 Census)
37.580 km² (14.510 sq mi) (2020 Census geography) Source ↗
Water area (2020 Census)
0.000 km² (0.000 sq mi) (2020 Census geography) Source ↗
Population per land area (2020 Census)
2,826.4 people/km² (7,320.3 people/sq mi) (2020 Census geography) Source ↗

American Community Survey estimates cover 2020–2024 and show the 90% margin of error when available. Gross rent includes rent and applicable tenant-paid utilities. Census and survey figures describe the geography used for that release; housing estimates are historical survey figures rather than current asking prices.

Area figures use the 2020 Census boundary. Population density is calculated from the 2020 Census population divided by its land area, excluding water.

Locate El Cajon

El Cajon in San Diego County. The marker shows a map reference point; it does not outline the neighborhood.
El Cajon in San Diego County. The marker shows a map reference point; it does not outline the neighborhood.

Other mapped places to explore

Distances are straight-line measurements between mapped reference points, rather than walking or driving distances.

Local information and resources

Guide sources

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Neighborhoods and local areas

2 named areas connected to El Cajon.

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Community guides

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Location sources

Neighborhood names and boundaries can overlap and vary by source.