ZIP 78664 vs ZIP 78681

This side-by-side compares ZIP 78664 (Round Rock, TX) and ZIP 78681 (Round Rock, TX) using the same Census ACS 5-Year table fields for both — no averages swapped in, no national proxies. ZIP 78664 has a population of 52,932 at 1,233 people per square mile, while ZIP 78681 has 50,606 at 899 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 78664 reports a median household income of $87,417 against $137,819 in ZIP 78681, with per-capita income of $43,876 vs $59,301. The share of adults holding a bachelor's degree or higher is 36.4% in 78664 and 58.0% in 78681. Poverty rate reads 10.2% vs 5.5%, and unemployment 4.4% vs 3.0% — 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 $358,200 in 78664 versus $497,300 in 78681, with median rent of $1,692 and $1,963 per month respectively. Homeownership rate is 53.7% vs 73.9%. 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.