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Median property tax bill and Mean adjusted gross income per return

Across 3,090 counties, Median property tax bill and Mean adjusted gross income per return have a link of +0.63, on a scale from −1 (opposite) to +1 (in step). But compare places with the same population density, income and education, and what is left could easily be chance. Most of the first figure came from both measures following how urban, rich and educated a place is, not from a link with each other.

Mostly gone after adjusting

Every place, plotted

One dot for each place reporting both measures. Hover over or tap a dot to see its name and values. The thin line is the straight line that best fits the dots. The bold line, shown for counties, is the link after adjusting for density, income and education. A dot far from the lines is a place that does not follow the pattern.

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What each measure is

Median property tax bill

The yearly property tax bill, in dollars, of the middle home-owning household that pays one. Households with no bill are left out, so this is what payers pay, not the average across all owners.

Census ACS 5-year · ACS table B25103_001

Mean adjusted gross income per return

Average adjusted gross income (income after a few deductions, as reported to the IRS) per tax return. Business and farm losses are subtracted. It counts only people who file, and people who earn too little to have to file are missing, which makes the poorest places look better off.

IRS Statistics of Income · IRS SOI A00100 / N1

Highest and lowest

Where each measure is highest and lowest among the places reporting both (2023), with the other measure beside it. This is shown for every size of place where both are published. Metro-area values are added up from their counties. A measure that cannot be added up across counties, such as a middle value (median), has no metro figure. Counts are shown per 1,000 residents, since raw totals would only list the largest places. Cities and towns and ZIP codes are shown where the Census survey or the CDC publishes them; most other sources stop at the county. They are shown for places of 5,000 residents or more, and only where the survey’s margin of error is small enough for the figure to be usable. The CDC publishes its health estimates for cities in a version adjusted for age, so places with older or younger people can be compared fairly, but not for ZIP codes.

Counties

By median property tax bill

Median property tax billMean adjusted gross income per return
Highest — 16 are at $10,000 or more; five shown.
Bergen County, NJ$10,000 or more$143,290
Essex County, NJ$10,000 or more$113,670
Hunterdon County, NJ$10,000 or more$156,320
Monmouth County, NJ$10,000 or more$143,770
Morris County, NJ$10,000 or more$162,480
Lowest — 7 are at $200 or less; five shown.
Northwest Arctic Borough, AK$200 or less$63,401
Kusilvak Census Area, AK$200 or less$27,083
Copper River Census Area, AK$200 or less$68,382
Choctaw County, AL$200 or less$61,012
Oglala Lakota County, SD$200 or less$40,977

By mean adjusted gross income per return

Median property tax billMean adjusted gross income per return
Highest
Teton County, WY5,462$509,150
Pitkin County, CO4,450$280,730
Summit County, UT3,469$265,720
New York County, NY$10,000 or more$257,310
Blaine County, ID2,563$252,880
Lowest
Kusilvak Census Area, AK$200 or less$27,083
Holmes County, MS695$37,015
Zapata County, TX912$38,812
Quitman County, MS792$39,003
Starr County, TX1,047$39,523
States

By median property tax bill

Median property tax billMean adjusted gross income per return
Highest
New Jersey9,541$112,230
Connecticut6,575$121,890
New Hampshire6,505$108,150
New York6,450$107,450
Massachusetts5,813$121,200
Lowest
Alabama738$77,740
West Virginia835$68,201
Arkansas1,003$76,591
Louisiana1,146$73,396
Mississippi1,189$65,732

By mean adjusted gross income per return

Median property tax billMean adjusted gross income per return
Highest
District of Columbia4,180$143,630
Connecticut6,575$121,890
Massachusetts5,813$121,200
Washington4,361$114,940
New Jersey9,541$112,230
Lowest
Mississippi1,189$65,732
West Virginia835$68,201
New Mexico1,669$69,650
Louisiana1,146$73,396
Kentucky1,472$73,748
Metro areas — Median property tax bill is not published for metro areas

By mean adjusted gross income per return

Median property tax billMean adjusted gross income per return
Highest
Jackson, WY-ID—$387,550
Naples-Marco Island, FL—$224,460
Hailey, ID—$220,660
Heber, UT—$220,380
San Jose-Sunnyvale-Santa Clara, CA—$211,950
Lowest
Zapata, TX—$38,812
Rio Grande City-Roma, TX—$39,523
Deming, NM—$41,040
Raymondville, TX—$43,300
Gallup, NM—$44,629
Cities and towns — Mean adjusted gross income per return is not published for cities and towns

By median property tax bill

Median property tax billMean adjusted gross income per return
Highest — 491 are at $10,000 or more; five shown.
Key Biscayne village, FL$10,000 or more—
Palm Beach town, FL$10,000 or more—
Parkland city, FL$10,000 or more—
Pinecrest village, FL$10,000 or more—
Barrington village, IL$10,000 or more—
Lowest — 11 are at $200 or less; five shown.
Vega Alta zona urbana, PR$200 or less—
Las Piedras zona urbana, PR$200 or less—
Juncos zona urbana, PR$200 or less—
Ville Platte city, LA$200 or less—
Tallulah city, LA$200 or less—
ZIP codes — Mean adjusted gross income per return is not published for ZIP codes

By median property tax bill

Median property tax billMean adjusted gross income per return
Highest — 712 are at $10,000 or more; five shown.
ZIP 10003 (New York city, NY)$10,000 or more—
ZIP 10005 (New York city, NY)$10,000 or more—
ZIP 10007 (New York city, NY)$10,000 or more—
ZIP 10010 (New York city, NY)$10,000 or more—
ZIP 10011 (New York city, NY)$10,000 or more—
Lowest — 28 are at $200 or less; five shown.
ZIP 00783 (Corozal Municipio, PR)$200 or less—
ZIP 00782 (Comerío Municipio, PR)$200 or less—
ZIP 00777 (Juncos Municipio, PR)$200 or less—
ZIP 00765 (Vieques Municipio, PR)$200 or less—
ZIP 00723 (Patillas Municipio, PR)$200 or less—

Counties furthest from the pattern

Compared with the straight line that best fits all 3,104 counties: the five with far more mean adjusted gross income per return than their median property tax bill would suggest, and the five with far less.

Median property tax billMean adjusted gross income per return
Above the line
Teton County, WY5,462$509,150
Pitkin County, CO4,450$280,730
Summit County, UT3,469$265,720
Blaine County, ID2,563$252,880
Glasscock County, TX1,154$214,190
Below the line
Passaic County, NJ$10,000 or more$73,650
Bronx County, NY5,310$47,417
Orange County, NY8,463$88,644
Middlesex County, NJ9,684$101,420
Camden County, NJ8,063$85,736

Two series, one county

Both measures over time for a county you pick. The two charts are stacked, so they share only the years along the bottom. You can pick from the thirty largest counties reporting both. This panel covers 2010–2024, and a measure published only once shows as a single dot.

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Every version of the link

Each row measures the same link, from −1 to +1, in a different way. If the rows mostly agree, the link does not depend on one choice of method.

Before adjusting for anything+0.6293,090 counties reporting both
After adjusting for density, income and education+0.056the part of the link that is not just how urban, rich and educated a place is
Also adjusting for population size+0.055size taken out as well as density
Also comparing only within each state+0.154each county is compared only with others in its own state, so this is no longer a comparison between states
Giving bigger counties more weight+0.194the adjusted link for the average resident rather than the average county. With this weighting, the data counts for about 287 equally weighted counties
Middle value inside single states+0.781the link worked out inside each of 40 states with at least 20 counties reporting
Using ranks, after adjusting+0.060uses each county’s rank, not its value, so a few extreme counties cannot create the link

How much to believe it

Could it be chance?

The p-value is the chance of seeing a link this strong if there were really none. A value of 0.05 or less means the link is unlikely to be chance. Very small values are written in short form: 3.1e-16 means 0.00000000000000031, and the bigger the number after “e-”, the smaller the value. Treating every county as a separate case gives p = 0.002. But counties in the same state tend to resemble each other, so the better figure allows for that: p = 0.150. The site tested 20,910 pairs, and testing so many turns up some flukes. The q-value allows for that too. For this pair it is 0.003.

Do nearby places look alike?

Moran’s I measures how much nearby places look alike: 0 means no map pattern, and higher means neighbours are more similar. For the part of each county that the adjustment leaves unexplained, it is +0.17 (p = 0.001). That unexplained part still clusters on the map. So some regional factor shared by both measures is not accounted for.

Did they change together?

The figures above compare counties at one moment. This asks a different question: where median property tax bill rose most, did mean adjusted gross income per returnmove too? Each county’s change is compared with the average change in its own state. That takes out ups and downs that hit a whole region at once. Each change is the gap between two estimates that both contain some error. That error pulls these links towards zero, so a weak one is weak partly for that reason. The q column shows whether a link could be a fluke, allowing for the many pairs tested: 0.05 or less means it is unlikely to be chance.

PeriodCountiesChange togetherWithin statesq
2014–2019 the main test: each Census survey figure averages five years, and these two do not overlap; before the pandemic2,971-0.16-0.040.598
2019–2023 a repeat check: its two five-year survey figures both include 2019, and it covers the COVID years2,977-0.00-0.010.835

Over the main period, any link between the changes could easily be chance. How change is measured.

Related pairs

Association only. Nothing here shows that either measure changes the other. This describes counties, not the people in them. Two measures going together across places does not mean the same people have both. How the US county data works · Explore Median property tax bill and Mean adjusted gross income per return