ZIP 94531 vs ZIP 94509

This side-by-side compares ZIP 94531 (Antioch, CA) and ZIP 94509 (Antioch, CA) using the same Census ACS 5-Year table fields for both — no averages swapped in, no national proxies. ZIP 94531 has a population of 40,290 at 1,421 people per square mile, while ZIP 94509 has 62,439 at 1,472 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 94531 reports a median household income of $120,927 against $86,196 in ZIP 94509, with per-capita income of $46,240 vs $37,545. The share of adults holding a bachelor's degree or higher is 32.3% in 94531 and 18.3% in 94509. Poverty rate reads 8.3% vs 13.4%, and unemployment 7.2% vs 7.5% — 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 $701,600 in 94531 versus $584,100 in 94509, with median rent of $3,150 and $2,062 per month respectively. Homeownership rate is 73.2% vs 58.0%. 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.