ZIP 63303 vs ZIP 63043

This side-by-side compares ZIP 63303 (Saint Charles, MO) and ZIP 63043 (Maryland Heights, MO) using the same Census ACS 5-Year table fields for both — no averages swapped in, no national proxies. ZIP 63303 has a population of 45,834 at 893 people per square mile, while ZIP 63043 has 22,367 at 610 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 63303 reports a median household income of $99,138 against $91,509 in ZIP 63043, with per-capita income of $58,928 vs $44,325. The share of adults holding a bachelor's degree or higher is 48.8% in 63303 and 45.5% in 63043. Poverty rate reads 5.3% vs 3.8%, and unemployment 2.1% vs 2.0% — 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 $321,100 in 63303 versus $227,600 in 63043, with median rent of $1,374 and $1,283 per month respectively. Homeownership rate is 74.1% vs 69.6%. 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.