92121 ZIP Code, San Diego, CA
92121 is a ZIP code in San Diego, California in San Diego County. It covers 13 square miles of land. The closest ZIP codes are 92093, 92161 and 92092. 3,974 people live here in 1,575 households. With about 317 people per square mile it is lightly settled, and owners and renters are mixed (50% own). Median household income is $135,938, above the California median of $99,122; 21% of residents moved in during the past year.
Quick facts
- Mailing city: San Diego, CA
- County: San Diego County
- Land area: 13 sq mi
- Population: 3,974
- Median household income: $135,938
- Carrier routes: 16 (1,834 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 3,974 |
| Households | 1,575 |
| Median household income | $135,938 |
| Income per person | $67,816 |
| Median age | 32.7 |
| Homeowners | 49.6% |
| Median home value | $1,085,200 |
| Median rent | $2,606 |
| Bachelor's degree or higher | 74.4% |
| Average commute (minutes) | 18.1 |
| Households with kids under 18 | 19.4% |
| Moved in the past year | 20.7% |
| Below the poverty line | 15.8% |
| Broadband internet | 99.2% |
| Speak a non-English language at home | 41.5% |
Household income
| % of households | Value |
|---|---|
| <$10K | 6.3% |
| $10–15K | 3.8% |
| $15–25K | 1.8% |
| $25–35K | 3.2% |
| $35–50K | 5.8% |
| $50–75K | 7.2% |
| $75–100K | 8.8% |
| $100–150K | 19.9% |
| $150–200K | 14.5% |
| $200K+ | 28.7% |
Age
| % of all residents | Value |
|---|---|
| <10 | 9.7% |
| 10–19 | 5.2% |
| 20–24 | 18.1% |
| 25–34 | 20.1% |
| 35–44 | 13.8% |
| 45–54 | 8.1% |
| 55–64 | 13.9% |
| 65–74 | 7.1% |
| 75+ | 4.0% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 30.8% |
| Owned outright | 15.6% |
| Rented | 46.2% |
| Vacant | 7.4% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 34.8% |
| Townhome | 27.4% |
| 2–4 units | 7.8% |
| 5–19 units | 20.6% |
| 20+ units | 9.3% |
| Mobile / other | 0.0% |
Businesses in 92121
2,907 business establishments with 123,633 employees (ZIP Codes Business Patterns 2023).
- Professional, Scientific, and Technical Services: 772
- Health Care and Social Assistance: 293
- Wholesale Trade: 287
- Manufacturing: 232
- Real Estate and Rental and Leasing: 167
- Other Services (except Public Administration): 161
- Finance and Insurance: 152
- Accommodation and Food Services: 150
EDDM carrier routes
92121 has 16 USPS carrier routes with 1,834 residential and 3,628 business mailboxes. Open the EDDM route map.
Carrier routes in 92121
92121 has 16 USPS carrier routes (16 city (C)) with 1,834 residential and 3,628 business mailboxes. Routes range from 4 homes (C026) to 717 homes (C001); the median route has 176 homes. The Census counted 1,575 households in 92121 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 4 |
| 250–499 | 1 |
| 500–749 | 2 |
| 750–999 | 0 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 92121 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C028 — USPS business mailboxes 399, 0 homes
- Route C016 — USPS business mailboxes 353, 0 homes
- Route C012 — USPS business mailboxes 344, 0 homes
- Route C005 — USPS business mailboxes 296, 0 homes
- Route C006 — USPS business mailboxes 291, 0 homes
Select these 5 routes on the route map
Every carrier route in 92121
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C001 | City | 717 | 17 | $82,399 | — | — | — |
| C002 | City | 0 | 271 | $132,492 | — | — | — |
| C004 | City | 0 | 285 | $82,399 | — | — | — |
| C005 | City | 0 | 296 | $132,492 | — | — | — |
| C006 | City | 0 | 291 | $82,399 | — | — | — |
| C012 | City | 0 | 344 | $132,492 | — | — | — |
| C015 | City | 535 | 0 | $200,001+ | — | — | — |
| C016 | City | 0 | 353 | $154,431 | — | — | — |
| C018 | City | 0 | 229 | $132,492 | — | — | — |
| C021 | City | 95 | 215 | $82,399 | — | — | — |
| C022 | City | 56 | 210 | $82,399 | — | — | — |
| C023 | City | 251 | 244 | $129,170 | — | — | — |
| C025 | City | 176 | 139 | $129,170 | — | — | — |
| C026 | City | 4 | 281 | $132,492 | — | — | — |
| C028 | City | 0 | 399 | $132,492 | — | — | — |
| C029 | City | 0 | 54 | $82,399 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 92121 on the EDDM route map.
How route demographics are estimated
Mailbox counts come from USPS; demographics are estimates
The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).
How a route gets its figures: the block-group length-share method
We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.
Margins of error
Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.
Different years
USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.
Why some routes show identical figures
Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.
Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Nearby ZIP codes
- 92093 — San Diego city, CA (2.3 mi)
- 92161 — San Diego city, CA (2.4 mi)
- 92092 — San Diego city, CA (2.5 mi)
- 92122 — San Diego city, CA (2.8 mi)
- 92126 — San Diego city, CA (3.5 mi)
- 92130 — San Diego city, CA (3.5 mi)
- 92145 — San Diego city, CA (3.9 mi)
- 92037 — San Diego city, CA (4.1 mi)
Areas that include 92121
- San Diego, CA ZIP codes — 48 ZIP codes
- San Diego County ZIP codes — 116 ZIP codes
- California ZIP code data
Where it ranks
- No. 19 of 92: highest median household income in San Diego County
- No. 20 of 92: highest median home value in San Diego County
- No. 13 of 98: highest share of residents who moved in during the past year in San Diego County
- No. 9 of 98: lowest median age in San Diego County
- No. 8 of 36: highest median household income in San Diego, CA
- No. 10 of 36: highest median home value in San Diego, CA
- No. 9 of 40: highest share of residents who moved in during the past year in San Diego, CA
- No. 7 of 40: lowest median age in San Diego, CA
Mail every home in 92121
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
San Diego EDDM mailing
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 92121, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 92121 in?
- 92121 is a San Diego, CA mailing address. By land area, 100% lies inside San Diego.
- What county is 92121 in?
- 92121 is in San Diego County.
- What is the population of 92121?
- About 3,974 people (±488), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 4,658.
- What is the median household income in 92121?
- $135,938 (±$15,307), compared with $99,122 for California as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 92121?
- 16 USPS carrier routes with 1,834 residential and 3,628 business mailboxes (5,446 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 92121?
- The closest, measured center to center: 92093 (2.3 mi, San Diego), 92161 (2.4 mi, San Diego), 92092 (2.5 mi, San Diego), 92122 (2.8 mi, San Diego), 92126 (3.5 mi, San Diego) and 92130 (3.5 mi, San Diego).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.