Everything added to redbluemap.com, newest first.
27 releases.
County-level life expectancyAdded from the same County Health Rankings file as the public safety measures below, under its own "Length of life" section since CHR categorizes it separately. Covers 97% of counties, far more complete than the homicide and firearm-fatality figures.
Health & politics report explains its own colorsThe report now states up front what red and blue mean: whichever fifth voted more Republican or Democratic for president in 2024, however close the margin — not a judgment about the variable being split on. Falls back to a neutral note for census tracts, which carry no election result to color by.
A contact formThe About page now has a contact form, for reporting a data problem or asking a question directly.
County-level public safety dataHomicide and firearm fatality rates per 100,000 people, from County Health Rankings, added at county geography. FBI crime data has no national county-level equivalent — it's reported per law-enforcement agency with no clean crosswalk to counties — so these CDC-mortality-based measures stand in.
A map, PDF export and political-lean colors on the Health, Wealth & Politics reportThe report now draws the matched areas on a map alongside the comparison, exports the whole thing to PDF, and colors each fifth red or blue for whichever party actually carried it in the 2024 presidential vote — not by which fifth is merely "lowest" or "highest." Geographies with no election result, like census tracts, get a neutral color pair instead.
Health & politics becomes a live reportPick any variable — a CDC health measure, an ACS figure, or presidential margin — and a geography (US counties, a state's counties, or a state's census tracts), and the page splits every area into fifths by that variable and compares the full detail-panel profile between the highest and lowest fifths, live. Replaces the earlier fixed comparison (health measures vs. 2024 margin only).
A Health & politics pageA new page lines up all 40 CDC health measures against 2024 presidential margin, county by county, population-weighted: which conditions run higher in strongly Republican vs. strongly Democratic counties, and by how much. Correlation across places, not a claim about people — the page says so.
Health data from CDC PLACES40 health measures — chronic disease, prevention, risk behaviors, disability, health status, and social needs — at county and census tract geography, added to the “Color by” list and the detail panel. Model-based small-area estimates, not a census count, same as this site's other demographic fields.
Statistics for a filtered setFilter with “Show only” and the panel now describes the areas that match, the way it describes a single county — population, the whole ACS profile, and the set’s own election result. Counts are summed and shares are population-weighted; medians are left out, because the mean of a set of medians is not a median. The 98 counties that swung Republican by ten points or more hold 43.5 million people and still voted Democratic by 13.7.
A front page that shows the electionThe map now opens on the 2024 presidential result by county, across the whole country, instead of on Minnesota's census tracts coloured by poverty rate. Counties also gained land area and population density, which had only ever been built for tracts, metros and states.
Connecticut fills inConnecticut was the one blank state on the county election layer. It abolished county government, and the Census Bureau replaced its eight counties with nine planning regions in 2022 — but the national returns file still reports the old counties, so nothing joined. Planning regions are built from whole towns, so the town results in the Secretary of the State's official Statement of Vote roll up to them exactly. Connecticut now carries 2016, 2020 and 2024, and the swings between them.
2016 precinctsThe precinct layer now carries two elections — 2020 and 2016 — chosen with the Election picker. 177,190 precincts in 2016; each election has its own geometry because precinct boundaries are redrawn every cycle.
Presidential trend chartsStates show 1976–2024 and counties 2000–2024, with a live cursor: move across the chart for each election's shares and margin.
County presidential results2024 and 2020 by county, the finest geography that carries a current election. Miami-Dade swings from D+7.3 to R+11.4.
Counties3,144 counties with the full American Community Survey profile.
Real 2024 US House resultsAll 436 districts, from the Clerk of the House's official returns. The 119th Congress was elected under exactly these lines, so unlike the 2020 figures these are not interpolated onto later boundaries.
2024 statewide resultsPresident in all 51 jurisdictions and Senate in 33, from MEDSL.
Voting precincts170,195 precincts with 2020 federal results — the geography elections are actually counted in.
Congressional districts436 districts with 2020 federal results and their full census profile.
Water clippingCensus tract boundaries run across open water to the state line, so Michigan rendered without its mitten and Minnesota reached into Lake Superior. Geometry is now clipped to the shoreline, which also fixed how 'zoom to state' frames the map.
Population densityLand area from the Census Gazetteer, with density derived from it. Listed above total population, which says little at tract level because tracts are drawn to hold roughly equal populations.
Race and Hispanic originAdded to the detail panel for every geography.
Population pyramid, income and industry breakdownsThe detail panel for every tract and metro area gained a population pyramid by age and sex, a household-income distribution, an industry-of-employment breakdown and a housing-age chart — all built from ACS data that was already stored but never shown. The "Color by" list grew well beyond its original 15 entries, grouped by category.
Schools overlay101,009 public schools as a toggle-able layer over any choropleth, filterable by level, with enrolment, staffing and free-lunch figures per school.
Metro areas935 metropolitan and micropolitan areas, including the 43 that cross state lines.
United States viewThe whole country coloured by state, with drill-down into any state's tracts.
Census tractsAll 84,401 tracts across 50 states and DC, with 276 ACS variables each.