U.S. Median Household Income, Explained: What $78,538 Really Means

When the U.S. Census Bureau publishes a single national figure for household income, it gets repeated everywhere — in news articles, political speeches, and real estate listings. The most recent American Community Survey 5-year estimate (ACS5, vintage 2023, released December 2024) puts U.S. median household income at roughly $78,538. That number sounds simple. It is not.

Behind that headline figure is a methodology that aggregates more than 3.5 million household responses collected continuously over five years, weighted to be representative of every U.S. ZIP Code Tabulation Area, county, and state. Understanding how it is computed — and what it deliberately leaves out — is the difference between using Census data well and being misled by it.

Median vs. mean: why the Census reports the median

Income distributions are right-skewed: a small number of very-high-income households pull the average upward. If you took the arithmetic mean, a few billionaires in a ZIP code can make a working-class neighborhood look affluent. The median — the income of the household exactly in the middle when all are sorted — is robust to those outliers.

That is why the ACS5 reports B19013_001E (median household income in the past 12 months) rather than mean household income (which is also published, in B19025, but rarely cited). For local areas where a handful of households can swing the mean by tens of thousands of dollars, the median is the only honest summary.

How geographic spread dwarfs the national figure

The national median is the midpoint of a distribution that ranges, at the state level, from about $54,000 in Mississippi to over $96,000 in Maryland. At the ZIP code level the spread is far wider — from sub-$25,000 medians in parts of the Mississippi Delta and Appalachia to medians above $250,000 in places like Atherton, California and Fisher Island, Florida.

A useful rule of thumb: any time you see a single 'national' income number, ask which level of geography is being summarized. ACS5 is published at the nation, state, county, place (city/town), ZCTA, and Census tract levels. Each tells a different story.

• Nation: $78,538 (ACS5 2019–2023)
• Highest state median: Maryland (~$98,461)
• Lowest state median: Mississippi (~$54,915)
• Spread between top and bottom state: ~$43,500

Why ACS5 lags real-time data — and why that's a feature

The 5-year estimate is a moving five-year average. The 2023 release covers 2019 through 2023. That makes it slower to react than monthly indicators from the Bureau of Labor Statistics, but vastly more reliable for small geographies. For a ZIP code with only a few thousand households, a single year of data would have a margin of error so wide it would be useless. Five years of pooled responses make ZIP-level estimates trustworthy.

When you compare two places on City Zip Compare, you are comparing two five-year averages. That is the right comparison for long-term decisions like where to live, where to open a business, or where to buy property.

Reading income with housing costs in mind

Income alone does not measure financial well-being. A $90,000 median in San Francisco buys very little after housing; a $60,000 median in Knoxville goes much further. The Census publishes median gross rent (B25064) and median home value (B25077) alongside income — the ratio of income to housing cost is a better signal of local affordability than either number in isolation.

On every ZIP and state page on City Zip Compare we show all three side-by-side, so you can see at a glance whether high incomes are being eaten by high housing costs.