U.S. ZIP Code Rankings: Income, Housing, Education

Ranked lists of "richest ZIP codes" or "most expensive ZIPs" make for great clickbait but often hide more than they reveal. ZIP code boundaries were never designed to be statistical units; they were designed for postal delivery routes. Some ZIPs cover dense urban blocks; others cover sprawling rural areas. ACS5 estimates for ZIPs with under ~5,000 residents have wide confidence intervals — the reported median is genuinely uncertain.

City Zip Compare publishes rankings, but we surface the methodology and caveats on every ranking page. The rule of thumb: don't take the #1 ZIP too seriously, but the top decile of any ranking is usually a meaningful pattern.

Top ZIPs by median household income are concentrated in a small number of well-known places: Atherton (94027), Fisher Island (33109), parts of Beverly Hills and the Upper East Side, the D.C. suburbs in Montgomery and Fairfax counties, and the wealthiest ZIPs in Connecticut's Fairfield County. These are not representative of "American wealth" — they are statistical extreme points.

Top ZIPs by median home value follow the same pattern. The top 1% of ZIPs by value are dominated by California, Hawaii, the New York metro and a handful of resort towns (Aspen, Jackson Hole, Telluride).

Read the ranking, then read the ZIP page for any place you actually care about. Look at the surrounding ZIPs in the same city or county. Cross-check against the state-level ranking for context. The ranking is a starting point for exploration, not an answer.