placestats

Tests taken

The number of tests the county's figures are based on.

Reported for3,136areas, in 50 states — none in DC, PR
Link to density0.86mostly reflects how urban a place is
Nearby places alike0.31Moran’s I: strongly, neighbouring places tend to be similar
Typecountcounts rise and fall together from size alone

How it has moved

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Every state, every year

Nothing to draw here: this measure has no state figures. Its publisher reports it for counties. This site does not add county numbers up into state figures, since a home-made figure could clash with one an agency publishes itself. The chart above covers the whole country, year by year.

Where it comes from

Stanford Education Data Archive · SEDA tot_asmts
Stanford University · pooled over 2009–2019 · Standard errors published (a measure of how far off a figure might be), converted to 90% margins

The number of tests the county figures are based on. Time period: pooled over 2009-2019, the years the archive covers; these are pre-pandemic results and describe a decade of testing rather than a single year.

Combining areas: added up across areas.

What it goes with

The strongest links that have a page of their own. Unadjusted is the link before adjusting for anything, from −1 (opposite) to +1 (in step). Adjusted compares places with the same population density, income and education levels, so those differences can’t explain the link. This list leaves out the 0 pairs built from the same numbers or the same model as this measure, since they are bound to match.

MeasureUnadjustedAdjusted
Tests taken and Share foreign-bornWhere Tests taken is higher, Share foreign-born tends to be higher: a weak link that holds when only places with similar density, income and education are compared, and inside states as well. Share foreign-born by US county+0.45+0.35

Population makeup

How this measure varies with the racial and ethnic makeup of counties. Every group is shown, whatever its rank. These are links across counties: they describe places, not people. They say nothing about any person’s risk or behaviour based on their race. Counties with a larger share of one group also differ in much else, such as income, segregation, region and history. The adjusted figure only accounts for density, income and education.

Share of residentsUnadjustedAdjusted
Tests taken and Share White, not HispanicWhere Tests taken is higher, Share White, not Hispanic tends to be lower: a weak link that holds when only places with similar density, income and education are compared, and inside states as well. Share White, not Hispanic by US county-0.26-0.23
Tests taken and Share Black, not HispanicCould easily be chance once only places with similar density, income and education are compared. Share Black, not Hispanic by US county+0.03+0.03
Tests taken and Share Hispanic or Latino, any raceWhere Tests taken is higher, Share Hispanic or Latino, any race tends to be higher: a weak link that holds when only places with similar density, income and education are compared, and inside states as well. Share Hispanic or Latino, any race by US county+0.20+0.23
Tests taken and Share Asian, not HispanicWhere Tests taken is higher, Share Asian, not Hispanic tends to be higher: a weak link that holds when only places with similar density, income and education are compared, and inside states as well. Share Asian, not Hispanic by US county+0.41+0.27
Tests taken and Share American Indian or Alaska Native, not HispanicCould easily be chance once only places with similar density, income and education are compared. Share American Indian or Alaska Native, not Hispanic by US county-0.10+0.08

Highest and lowest, per 1,000 residents

Of 3,135 counties reporting it. This is a count, so it is ranked per 1,000 residents, not as published. Ranked by raw totals, it would just list the largest counties in the country. Its link to population is 0.86, so the raw order would match almost every other count here. The published totals are in the table on each place page.

Highest

  1. Ziebach County, SD — 3990.04 (9,616 total)
  2. King County, TX — 3894.18 (736 total)
  3. Hyde County, SD — 3696.55 (4,824 total)
  4. Schley County, GA — 3053.10 (13,858 total)
  5. Oldham County, TX — 2987.12 (6,264 total)

Lowest

  1. Slope County, ND — 231.45 (184 total)
  2. Skagway Municipality, AK — 248.47 (325 total)
  3. Dolores County, CO — 267.92 (639 total)
  4. San Juan County, WA — 298.42 (5,451 total)
  5. Rockbridge County, VA — 323.94 (7,314 total)

The middle area reports 1367.57. The middle half of counties falls between 1132.01 and 1581.57 (the 25th to 75th percentile).

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