ZIP 94002 vs ZIP 94403

This side-by-side compares ZIP 94002 (Belmont, CA) and ZIP 94403 (San Mateo, CA) using the same Census ACS 5-Year table fields for both — no averages swapped in, no national proxies. ZIP 94002 has a population of 25,992 at 1,773 people per square mile, while ZIP 94403 has 39,642 at 2,718 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 94002 reports a median household income of $203,965 against $174,917 in ZIP 94403, with per-capita income of $100,792 vs $88,226. The share of adults holding a bachelor's degree or higher is 69.4% in 94002 and 60.6% in 94403. Poverty rate reads 7.0% vs 6.6%, and unemployment 7.2% vs 5.8% — 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 $2,000,001 in 94002 versus $1,746,300 in 94403, with median rent of $2,872 and $3,263 per month respectively. Homeownership rate is 55.0% vs 52.5%. 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.