ZIP 06830 vs ZIP 06831

This side-by-side compares ZIP 06830 (Greenwich, CT) and ZIP 06831 (Greenwich, CT) using the same Census ACS 5-Year table fields for both — no averages swapped in, no national proxies. ZIP 06830 has a population of 24,027 at 683 people per square mile, while ZIP 06831 has 14,792 at 207 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 06830 reports a median household income of $146,654 against $227,159 in ZIP 06831, with per-capita income of $137,502 vs $142,594. The share of adults holding a bachelor's degree or higher is 67.9% in 06830 and 70.9% in 06831. Poverty rate reads 8.6% vs 4.6%, and unemployment 7.9% vs 4.2% — 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 $1,660,700 in 06830 versus $1,696,000 in 06831, with median rent of $2,374 and $3,501 per month respectively. Homeownership rate is 57.4% vs 79.0%. 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.