ZIP 31558 vs ZIP 31548

This side-by-side compares ZIP 31558 (Saint Marys, GA) and ZIP 31548 (Kingsland, GA) using the same Census ACS 5-Year table fields for both — no averages swapped in, no national proxies. ZIP 31558 has a population of 20,373 at 104 people per square mile, while ZIP 31548 has 20,020 at 136 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 31558 reports a median household income of $74,268 against $75,804 in ZIP 31548, with per-capita income of $35,708 vs $35,293. The share of adults holding a bachelor's degree or higher is 27.1% in 31558 and 21.7% in 31548. Poverty rate reads 17.7% vs 10.2%, and unemployment 7.2% vs 3.2% — 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 $297,000 in 31558 versus $250,600 in 31548, with median rent of $1,265 and $1,247 per month respectively. Homeownership rate is 58.8% vs 68.8%. 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.