Zip Code 94121
San Francisco, California — San Francisco County
📍 ZIP code 94121 is in San Francisco, San Francisco County, California.
ZIP code 94121 is located in San Francisco, San Francisco County, California. It is a zip code in the Pacific (PST/PDT) Time Zone with an estimated population of 42,987. The area code for ZIP code 94121 is 415.
Quick Answer
Zip code 94121 is in San Francisco, California (San Francisco County). It has a population of 42,987, median household income of $138,353, and median home value of $1,634,600.
Population
42,987
Income
$138,353
Home Value
$1,634,600
Climate
62°F / 46°F
About Zip Code 94121
Zip code 94121 is located in San Francisco, California, within San Francisco County. Home to approximately 42,987 residents, this area sits at an elevation of 210 ft and falls within the Pacific (PST/PDT) timezone. The local area code is 415.
The median household income is $138,353 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $1,634,600, and the cost of living index is 250 (150% above the national average of 100).
Summers average a high of 62°F while winters drop to 46°F. The area receives about 21 in of rain annually. The zip code covers 3.1 square miles of land area.
Key Statistics
42,987
$138,353
$1,634,600
Pacific (PST/PDT)
415
210 ft
3.1 sq mi
43.7
19,742
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Compare With Nearby Zip Codes
| Metric | 94121 | 94122 | 94118 | 94129 | 94116 | 94117 |
|---|---|---|---|---|---|---|
| City | San Francisco, CA | San Francisco, CA | San Francisco, CA | San Francisco, CA | San Francisco, CA | San Francisco, CA |
| Population | 42,987 | 57,369 | 39,275 | 3,808 | 42,523 | 37,575 |
| Median Income | $138,353 | $145,717 | $159,550 | $236,190 | $152,587 | $175,096 |
| Home Value | $1,634,600 | $1,507,100 | $1,817,200 | $0 | $1,450,000 | $1,641,400 |
| Cost of Living | 250 | 250 | 250 | 186 | 250 | 250 |
| Median Age | 43.7 | 42.2 | 39.1 | 34.2 | 45.4 | 35 |
Cost of Living
100 = National Average. San Francisco's cost of living is 150% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
11.8x
Demographics
Zip code 94121 has a population of 42,987 people with a median age of 43.7. There are 19,742 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
San Francisco (94121) population trend from 2010 to 2024
↑ 13.5%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
62°F
46°F
21 in
0 in
San Francisco experiences mild summers with average highs around 62°F. Winters are mild with lows averaging 46°F. The area receives virtually no snowfall.
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Housing & Economy
Median Home Value
$1,634,600
Median Household Income
$138,353
With 19,742 housing units across 3.1 square miles, 94121 has a housing density of 6,368 units per square mile. The home price-to-income ratio is 11.8x.
Location & Geography
Latitude
37.7768°
Longitude
-122.4947°
Land Area
3.1 sq mi
Water Area
0 sq mi
Nearby Zip Codes
Zip codes closest to 94121 (San Francisco, CA) with distances:
All Zip Codes in San Francisco, CA
Other zip codes serving San Francisco:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 94121's $138,353. A way to compare San Francisco to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 94121 (San Francisco, CA). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is San Francisco, California?
San Francisco, California uses zip code 94121 along with 12 other zip codes.
What county is zip code 94121 in?
Zip code 94121 is located in San Francisco County, California.
What is the population of zip code 94121?
The population of zip code 94121 is 42,987 with a median age of 43.7.
Is 94121 in San Francisco, California?
Yes, zip code 94121 is in San Francisco, San Francisco County, California. The area code is 415.
Frequently Asked Questions
What city is zip code 94121 in?
Zip code 94121 is in San Francisco, California. It is part of San Francisco County and uses the Pacific (PST/PDT) timezone.
What is zip code 94121?
Zip code 94121 is a U.S. postal code in San Francisco, California (San Francisco County). It has a population of 42,987 and covers 3.1 square miles.
What is the population of zip code 94121?
The population of zip code 94121 (San Francisco, CA) is 42,987 with a median age of 43.7. There are approximately 19,742 housing units in this area.
What is the median income in zip code 94121?
The median household income in zip code 94121 (San Francisco, CA) is $138,353 per year. The cost of living index is 250 (100 = national average).
What is the average home price in zip code 94121?
The median home value in zip code 94121 (San Francisco, CA) is $1,634,600. The cost of living index is 250 compared to the national average of 100.
What county is zip code 94121 in?
Zip code 94121 is located in San Francisco County, California. The primary city is San Francisco.
What is the area code for zip code 94121?
Zip code 94121 in San Francisco, CA uses area code 415. It is located in the Pacific (PST/PDT) timezone.
Is zip code 94121 a good place to live?
Zip code 94121 (San Francisco, CA) has a cost of living index of 250 (100 = national average), a median household income of $138,353, and median home values of $1,634,600. The median age is 43.7. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 94121?
The cost of living index for zip code 94121 (San Francisco, CA) is 250, where 100 represents the national average. This area is above the national average. Median home value: $1,634,600.
What schools serve zip code 94121?
Zip code 94121 in San Francisco, California is served by the local school district of San Francisco County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.