Lake San Marcos, CA ZIP Codes
One ZIP code serves Lake San Marcos, California: 92078. Together they are home to 53,605 residents in 18,522 households. That is more than the 4,693 people counted inside Lake San Marcos Census-designated place, because these ZIP codes reach past its boundary.
Lake San Marcos Census-designated place
| Measure | Census figure |
|---|---|
| Residents | 4,693 |
| Households | 2,000 |
| Median household income | $89,851 |
| Median home value | $917,000 |
| Median age | 63 |
| Median rent | $2,585 |
All 1 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 53,605 |
| Households (sum of ZIP codes) | 18,522 |
| Median household income, range across ZIP codes | $120,268 (92078) to $120,268 (92078) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $120,268 |
| Homeowners | 72.0% |
| Households with kids under 18 | 38.6% |
| Moved in the past year | 11.8% |
| Carrier routes in EDDM2GO's route library | 25 routes, 19,330 homes (1 of 1 ZIP codes) |
Every ZIP code in Lake San Marcos
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 92078 | San Marcos | 53,605 | 18,522 | $120,268 | $942,300 | 72.0% | 38.6% | 11.8% | 25 | 20,824 | 10% of its land |
A ZIP code is listed for Lake San Marcos when at least 10% of its land lies inside the Lake San Marcos Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Lake San Marcos. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Lake San Marcos.
Counties
- San Diego County — 116 ZIP codes
Nearby cities sharing these ZIP codes
- San Marcos — 3 ZIP codes
Price a mailing to Lake San Marcos ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Lake San Marcos, CA?
- 92078. A ZIP code is listed for Lake San Marcos when at least 10% of its land lies inside the Lake San Marcos Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Lake San Marcos.
- What is the population of Lake San Marcos, CA?
- The Census Bureau counts 4,693 residents inside Lake San Marcos Census-designated place (ACS 2020–2024). The 1 ZIP code that serve Lake San Marcos hold 53,605 residents in all.
- What is the median household income in Lake San Marcos, CA?
- $89,851 inside Lake San Marcos Census-designated place, per the Census Bureau. Across its ZIP codes the medians run from $120,268 to $120,268.
- How many carrier routes and mailboxes are in Lake San Marcos, CA?
- For the 1 of 1 ZIP codes in EDDM2GO's stored route library: 25 carrier routes reaching 19,330 residential and 1,494 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.