Rancho San Diego, California
30 topographic sheets cover this place, the earliest surveyed in 1903 and the latest in 1994. It stands in the San Diego census division. It lies in ZIP code area 92019. It lies near Jamacha Valley. The Survey maps it on the Jamul Mountains quadrangle. 21,858 people lived here at the 2020 count. It stands 361 feet above sea level.
Then and now
1903 to 1994The same ground, surveyed 91 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.


Compare 1903 against another survey:
Population over time
2 figuresRancho San Diego grew from 21,208 to 21,858 between 2010 and 2020. These are the recorded population figures Wikidata holds for this place, reached through the Geographic Names Information System number this page is keyed on rather than by name, so they belong to this place and not to another of the same name. Most are census counts, but not all are: an early figure may be a founding or settlement estimate, and an estimate published within five years of a census is left out. The change column is computed, and is left blank where more than 20 years separate a figure from the one before it, because a gap that long is not a change between two counts.
| Year | People | Change |
|---|---|---|
| 2010 | 21,208 | |
| 2020 | 21,858 | +650 (+3%) |
Topographic sheets covering this place
11 surveys from 30 printed sheetsMatched by testing this settlement's coordinate against the published boundary of every sheet in the United States Geological Survey's historical collection. Each opens the scanned sheet at the Survey.
- 1903 USGS Cuyamaca quadrangle1:125000, 6 printings
- 1904 USGS Southern California Sheet No. 2 quadrangle1:250000, 5 printings
- 1943 USGS Jamul quadrangle1:62500
- 1950 USGS San Diego quadrangle1:250000
- 1954 USGS San Diego quadrangle1:250000
- 1955 USGS Jamul quadrangle1:62500, 3 printings
- 1955 USGS Jamul Mountains quadrangle1:24000, 5 printings
- 1955 USGS San Diego quadrangle1:250000
- 1958 USGS San Diego quadrangle1:250000, 4 printings
- 1979 USGS El Cajon quadrangle1:100000, 2 printings
- 1994 USGS Jamul Mountains quadrangle1:24000
Fires near this place
589 since 1992Regional context, not property-specific evidence. The federal wildfire occurrence database lists 589 fires within 5 miles of Rancho San Diego between 1992 and 2020, burning about 1,278 acres in total. 5 started naturally. 81 were recorded as arson. Distance is straight-line from the map coordinates, so a fire counted here may appear on a neighbouring settlement's page as well.
| Reported cause | Fires |
|---|---|
| Missing data/not specified/undetermined | 325 |
| Equipment and vehicle use | 92 |
| Arson/incendiarism | 81 |
| Recreation and ceremony | 30 |
| Debris and open burning | 21 |
| Misuse of fire by a minor | 18 |
| Smoking | 10 |
| Natural | 5 |
| Power generation/transmission/distribution | 4 |
| Other causes | 2 |
| Fireworks | 1 |
The most recent of them, most recent first, with the day each was reported and the service that recorded it.
| Date | Cause | Size | Reported by | Name on the report |
|---|---|---|---|---|
| 9 September 2004 | Missing data/not specified/undetermined | under an acre | San Diego National Wildlife Refuge | SYCUAN |
| 9 September 2002 | Arson/incendiarism | under an acre | California Desert District | PROCTOR |
| 9 September 2002 | Arson/incendiarism | under an acre | San Diego National Wildlife Refuge | PROCTOR3 |
| 9 September 2002 | Arson/incendiarism | under an acre | San Diego National Wildlife Refuge | PROCTOR2 |
| 9 September 1994 | Missing data/not specified/undetermined | 4.0 acres | San Diego National Wildlife Refuge | PAR |
| 8 September 2006 | Recreation and ceremony | under an acre | San Diego National Wildlife Refuge | JAMACHA |
| 8 September 2006 | Equipment and vehicle use | under an acre | San Diego National Wildlife Refuge | CREEK |
| 8 September 1998 | Equipment and vehicle use | under an acre | San Diego Unit | POWERLINE |
Settlements close enough to share some of these fires:
Mines and quarries near this place
10 of 37 shownRegional context, not property-specific evidence. The federal mineral resources record lists 37 workings within 5 miles of Rancho San Diego: 21 past producers, 13 producers, 2 occurrences, 1 prospect. 13 still produce. What was taken out: Stone, Crushed/Broken, Sand and Gravel, Construction, Granite, Gold. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.
| Where | Site | Commodity | Status | Recorded |
|---|---|---|---|---|
| Coyote Mountains Nickel Prospect | Nickel | Occurrence | Garnierite | |
| Coyote Mtn Gypsum & S | Sulfur, Gypsum-Anhydrite | Producer | Gypsum | |
| Dehesa Deposit | Stone, Dimension | Occurrence | ||
| El Granito Mineral Springs | Geothermal | Producer | ||
| Mcginty Mountain Deposit | Feldspar | Past Producer | ||
| Mcginty Mtn Deposit Dehesa Cornty | Feldspar | Producer | ||
| Independent Stone Co Quarry | Stone | Producer | ||
| Unnamed Quarry | Stone | Past Producer | ||
| Unnamed Quarry | Stone | Past Producer | ||
| Lost Peg Leg Claim | Gold | Prospect |
Nearest settlements
The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.
| Map | Place | Distance | Sheets |
|---|---|---|---|
| Jamacha Junction | 0.7 miles | 30 | |
| Jamacha | 1.3 miles | 30 | |
| Calavo Gardens | 1.7 miles | 42 | |
| Homelands | 2.0 miles | 30 | |
| Hillsdale | 2.2 miles | 42 | |
| Casa de Oro | 2.4 miles | 30 | |
| Mount Helix | 2.9 miles | 42 | |
| Spring Valley | 3.4 miles | 30 |
Elsewhere
Matched on this settlement's Geographic Names Information System number rather than its name, so it cannot be a different place of the same name in another state.
| Wikipedia article on Rancho San Diego | An encyclopaedic summary. Its text is share-alike, so it is linked here rather than copied. |
| Wikidata item Q1489677 | The structured record the population and elevation above come from. Public domain (CC0). |
Provenance
This settlement is recorded in the Geographic Names Information System as feature 1867053. The sheet list is computed by point-in-boundary test against the United States Geological Survey's historical topographic inventory. Both are works of the United States government and carry no copyright under 17 U.S.C. 105.
Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.
Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.










