placestats

Black Protestant adherents and Violent crime rate

A county is not a congregation. Counties where more people are counted as adherents (members of a religious group) also tend to differ on the other measure, and that is all. It does not follow that the adherents are the people with the different score. Making that leap is called the ecological fallacy: reading a pattern across places as a fact about individual people. It is as easy to fall into here as with the voting pairs. Two things about the counting matter too. Adherents are counted where their congregation meets, not where they live, so thirty very small counties exceed 100%. And a denomination that did not report is missing, not zero. That undercounts membership most where churches are least formally organised.

Where Black Protestant adherents is higher, Violent crime rate tends to be higher. The link is weak: +0.34 across 2,280 counties, on a scale from −1 (opposite) to +1 (in step). That figure compares places with the same population density, income and education, so those differences can't explain it. It holds inside states too. Measured separately within each of 36 states, the middle value of the link is +0.46.

Holds 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

Black Protestant adherents

Members of the historically Black Protestant churches, as a share of the population. Their central records are thinner than most, so this is the least complete of the six groups. Which of these churches reported also differs between the 2010 and 2020 studies, so part of any change between them is who reported, not real membership.

US Religion Census (ASARB) · Religion Census BPRTRATE (2010, 2020)

Violent crime rate

Murders, rapes, robberies and aggravated assaults in the year, per 100,000 residents, from the FBI. It counts only crimes reported to police or found by them, so crimes nobody reports are missing. For a state, the figure is the FBI's estimate, which fills in for police agencies that did not report. For a county, it is only what the agencies reported, and it is shown only where agencies that reported for all 12 months serve at least 90% of the people who live there.

FBI Uniform Crime Reporting program (Crime Data Explorer) · FBI Crime Data Explorer: states, estimated_crimes violent_crime; counties, Return A master file, actual offenses

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 Black Protestant adherents

By violent crime rate

States

By Black Protestant adherents

Black Protestant adherentsViolent crime rate
Highest
District of Columbia10.41,142
Mississippi8.7202
Alabama7.65417
Arkansas6.31623
Tennessee5.74636
Lowest
Vermont0216
New Hampshire0.02115
North Dakota0.05280
Montana0.06449
Idaho0.07240

By violent crime rate

Black Protestant adherentsViolent crime rate
Highest
District of Columbia10.41,142
New Mexico0.47747
Alaska0.77734
Tennessee5.74636
Arkansas6.31623
Lowest
Maine0.09104
New Hampshire0.02115
Connecticut1.55152
Rhode Island0.13167
Wyoming0.31194
Metro areas

By Black Protestant adherents

Black Protestant adherentsViolent crime rate
Highest
Magnolia, AR25.7323
Camden, AR25.5668
El Dorado, AR22.51,012
Pine Bluff, AR21.21,057
Memphis, TN-MS-AR17.11,453
Lowest
Zapata, TX050.5
Yankton, SD0274
Worthington, MN0279
Woodward, OK0303
Wisconsin Rapids-Marshfield, WI0269

By violent crime rate

Black Protestant adherentsViolent crime rate
Highest
Memphis, TN-MS-AR17.11,453
Lumberton, NC4.391,421
Orangeburg, SC10.51,414
Forrest City, AR12.91,324
Albuquerque, NM0.5191,152
Lowest
Quincy, IL-MO0.7290
Lexington, NE00
Columbus, IN0.1216.1
Pikeville, KY0.24231.1
Moscow, ID035.7

Counties furthest from the pattern

Compared with the straight line that best fits all 2,289 counties: the five with far more violent crime rate than their Black Protestant adherents would suggest, and the five with far less.

Black Protestant adherentsViolent crime rate
Above the line
Baltimore city, MD101,694
Shelby County, TN19.81,876
Robeson County, NC4.391,421
Alameda County, CA2.581,332
Crittenden County, AR20.41,764
Below the line
Nevada County, AR34.6331
McCormick County, SC17.7111
Columbia County, AR25.7323
Camden County, NC16.4107
Bladen County, NC22.7283

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+0.4242,280 counties reporting both
After adjusting for density, income and education+0.337the part of the link that is not just how urban, rich and educated a place is
Also adjusting for population size+0.363size taken out as well as density
Also comparing only within each state+0.287each county is compared only with others in its own state, so this is no longer a comparison between states
Giving bigger counties more weight+0.417the adjusted link for the average resident rather than the average county. With this weighting, the data counts for about 237 equally weighted counties
Middle value inside single states+0.459the link worked out inside each of 36 states with at least 20 counties reporting
Using ranks, after adjusting+0.294uses 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 = 1.6e-61. But counties in the same state tend to resemble each other, so the better figure allows for that: p = 4.9e-9. The site tested 29,403 pairs, and testing so many turns up some flukes. The q-value allows for that too. For this pair it is 1.2e-60.

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 +0.30 (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?

Not measurable: at least one of these is published for too few of the years a change needs (2014–2019 or 2019–2023), or for too few counties in both.

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 Black Protestant adherents and Violent crime rate