ZIP 06870 vs ZIP 06878

This side-by-side compares ZIP 06870 (Old Greenwich, CT) and ZIP 06878 (Riverside, CT) using the same Census ACS 5-Year table fields for both — no averages swapped in, no national proxies. ZIP 06870 has a population of 7,316 at 1,231 people per square mile, while ZIP 06878 has 8,043 at 1,295 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 06870 reports a median household income of $250,001 against $250,001 in ZIP 06878, with per-capita income of $144,459 vs $147,326. The share of adults holding a bachelor's degree or higher is 85.4% in 06870 and 78.8% in 06878. Poverty rate reads 3.4% vs 3.6%, and unemployment 4.1% vs 5.7% — 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 $1,788,700 in 06870 versus $1,968,800 in 06878, with median rent of $3,501 and $3,501 per month respectively. Homeownership rate is 83.9% vs 82.6%. 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.