CIA World Factbook
Country profiles covering geography, people, government, economy, and more for 261 world entities.
Central Intelligence Agency
Resources — government data sources and their current status.
EPA Climate Change Indicators
57 indicators with 145 figures tracking greenhouse gases, temperature, sea level, Arctic ice, droughts, wildfires, and more.
Environmental Protection Agency
Principles of America — 250th Anniversary Archive
93 foundational documents, speeches, books, and court decisions — from Common Sense to the modern era — with full official texts and source links.
Multiple (National Archives, Library of Congress, and others)
Bulk Data Mirror — Federal Register, CFR, Bills & More
Complete byte-exact mirrors of the Federal Register (2000–present), Code of Federal Regulations, congressional bills, Statutes at Large, EPA Toxics Release Inventory, and the removed EPA EJScreen data — every file downloadable with SHA-256 checksums.
GPO / GovInfo, EPA
NASA Global Temperature (GISTEMP)
Annual global land-ocean surface temperature anomalies from 1880 to present — the headline measure of global warming.
NASA Goddard Institute for Space Studies
NOAA Atmospheric CO₂ (Mauna Loa)
The Keeling Curve — annual mean atmospheric carbon dioxide measured at Mauna Loa since 1958.
NOAA Global Monitoring Laboratory
NOAA Billion-Dollar Disasters
Every U.S. weather and climate disaster since 1980 exceeding $1 billion in CPI-adjusted damages.
NOAA National Centers for Environmental Information
U.S. National Debt, 1790–Present
Total public debt outstanding at the end of every fiscal year since 1790 — 235+ years of the nation's balance sheet.
U.S. Department of the Treasury
Consumer Price Index (CPI-U)
The canonical U.S. inflation measure — annual averages since 1913 with year-over-year inflation rates.
Bureau of Labor Statistics
U.S. Life Expectancy & Death Rates
Life expectancy at birth and age-adjusted death rates since 1900, by race and sex.
CDC National Center for Health Statistics
State Population Estimates
Annual resident population estimates for every state and the nation, 2020–2024.
U.S. Census Bureau
U.S. Tornado Database, 1950–Present
Every recorded U.S. tornado since 1950 — over 71,000 events with location, magnitude, injuries, and fatalities.
NOAA Storm Prediction Center
Presidential Campaign Finance, 1980–2024
Receipts and disbursements of top presidential candidates in every cycle since 1980, from FEC bulk summary files.
Federal Election Commission
USDA Economic Research Service
Research on agriculture, food, rural economies, and natural resources.
U.S. Department of Agriculture
CDC BRFSS
Health-related risk behavior surveys and chronic health condition data.
Centers for Disease Control
Data.gov
Federal open data portal with 250,000+ datasets across agencies.
General Services Administration
Census Economic Indicators
GDP, trade balance, retail sales, housing starts, and manufacturing data.
U.S. Census Bureau
NOAA Climate Data Online
Historical weather and climate data from stations worldwide.
NOAA
EIA Energy Data
Energy production, consumption, imports, exports, and price data.
Department of Energy
NSF Research Data
Research findings, datasets, and publications from NSF-funded grants.
National Science Foundation
Bureau of Labor Statistics
Employment, wages, inflation (CPI), and productivity statistics.
Department of Labor
USGS Water Data
Streamflow, groundwater levels, and water quality measurements.
U.S. Geological Survey
NIH National Library of Medicine
PubMed, MedlinePlus, ClinicalTrials.gov, and biomedical research databases.
National Institutes of Health