ZIP 94030 vs ZIP 94128

Source:

Millbrae, CA — San Francisco, CA

This side-by-side compares ZIP 94030 (Millbrae, CA) and ZIP 94128 (San Francisco, CA) using the same Census ACS 5-Year table fields for both — no averages swapped in, no national proxies. ZIP 94030 has a population of 21,536 at 2,454 people per square mile, while ZIP 94128 has 69 at 8 per square mile. That difference in population size and density alone reshapes how every other metric should be interpreted — a higher-income ZIP with 1,200 residents behaves very differently from one with 45,000.

On income and education, ZIP 94030 reports a median household income of $163,476 against in ZIP 94128, with per-capita income of $78,551 vs . The share of adults holding a bachelor's degree or higher is 52.7% in 94030 and in 94128. Poverty rate reads 6.0% vs , and unemployment 5.7% vs — these four fields alone drive most of the difference in the scorecard grades you will see for each ZIP.

Housing separates these two ZIPs further: median home value sits at $1,934,900 in 94030 versus in 94128, with median rent of $3,272 and per month respectively. Homeownership rate is 60.8% vs . When reading the comparison table below, focus on paired metrics rather than single winners — a ZIP with lower home values and lower income is not strictly "worse" if rent-to-income ratios and commute times land in the same zone. Every value is pulled from the exact same ACS table so the two columns are genuinely comparable.

Compare different ZIP codes:

vs
Metric
94030
Millbrae, CA
94128
San Francisco, CA
Population 21,536 69
Median Household Income $163,476
Per Capita Income $78,551
Median Age 43.7
Bachelor's Degree or Higher 52.7%
Poverty Rate 6.0%
Unemployment Rate 5.7%
Median Home Value $1,934,900
Median Rent (monthly) $3,272
Homeownership Rate 60.8%
Population Density (per sq mi) 2,454 8

Values highlighted in green indicate the better metric where applicable. Source: U.S. Census Bureau ACS 2023.

Full Profile
94030
Millbrae, CA
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Full Profile
94128
San Francisco, CA
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What are common questions about this comparison?

How do ZIP codes 94030 and 94128 compare?
ZIP 94030 (Millbrae, CA) has a population of 21,536 and a median household income of $163,476. ZIP 94128 (San Francisco, CA) has a population of 69 and a median household income of —.
Which ZIP code has higher income, 94030 or 94128?
Income data is not available for one or both of these ZIP codes.
How do I compare two ZIP codes on PlainZIP?
Visit plainzip.com/compare, enter two 5-digit U.S. ZIP codes, and click Compare. You can also navigate directly to /compare/XXXXX-vs-YYYYY to share a specific comparison.

All data sourced from the U.S. Census Bureau, American Community Survey (ACS) 5-Year Estimates (2023).

PlainZIP is not affiliated with the U.S. Census Bureau or any government agency.

Data sourced from official U.S. Census ACS and HUD-USPS ZIP crosswalk data. See our methodology for details. Retrieved and formatted by PlainZIP Editorial.