Data & official records
U.S. Census Bureau
data.census.gov
Data & official recordsfree
Search US demographic, housing, and business tables. Export a table or import a topic profile page to ground population and market-sizing questions.
data.census.gov holds the American Community Survey and Economic Census tables that answer market-sizing and demographic questions down to the county or tract level, which fits anything comparing a metro area's population, income, or housing stock. Because the table IDs and filters aren't intuitive, importing a topic profile page tends to work better in a notebook than a raw multi-column export. It's the closest thing to an official population count for the US, but comparisons across census years need care around boundary and definition changes.
Import into Gemini Notebook
- 1Copy the link above (or a specific page from the site).
- 2In your notebook, click Add source → Website.
- 3Paste the link and confirm — several links can be pasted at once, one per line.
Gemini Notebook is a reading tool, not a spreadsheet engine — feed it the written reports and summary pages, not raw CSVs, and ask about what the documents say.
More data & official records sources
- World Bank Open DataDevelopment and economic indicators for every country, each with a written overview page that imports cleanly.
- IMF Data & ReportsMacroeconomic outlooks and country reports — the Article IV PDFs are dense, citable source material.
- OECD DataComparative statistics and policy reports across member economies, with strong methodology notes.
- SEC EDGAREvery US public company filing — 10-Ks and 10-Qs make excellent grounded sources for company research.
- Our World in DataLong-form, sourced explainers on global trends — article pages import with their context intact.
- Baseball SavantStatcast data for MLB — pitch tracking, exit velocity, player pages. Export search results as CSV and upload them for stat-grounded notebooks.
- Baseball-ReferenceComplete MLB history: stats, box scores, and standings back to the 1800s. Player and season pages paste in well as Website sources.
- Basketball-ReferenceNBA statistics back to the league's founding, including advanced metrics. Player and team pages import as Website sources.
- Bureau of Transportation StatisticsOfficial US transportation statistics — freight, aviation, border crossings. Download tables as CSVs or grab the report PDFs.
- CLARIN Virtual Language ObservatoryFinder for language corpora and tools held by European research centres. Use it to locate a resource, then import its documentation or texts.
- data.europa.euThe EU's open data portal spanning member states and institutions. Dataset description pages give Gemini Notebook useful context even when the data itself is CSV.
- Data.govUS federal open data catalog with hundreds of thousands of datasets. Import a dataset's landing page as a Website source to ground answers about the data.
- DryadOpen repository of curated research datasets, heaviest in biology and medicine. Each dataset's landing page and README summarize methods and variables.
- EurostatOfficial EU statistics on economy, population and society. The Statistics Explained articles summarize each dataset and import neatly as Website sources.
- FBrefDeep soccer statistics — player and team tables, match logs and advanced metrics like xG. Stat pages import as Website sources for sports analysis.
- FigshareRepository where researchers publish datasets, figures, code and posters with citable DOIs. Useful for finding the supplementary material behind papers.
- GADMFree downloadable maps of administrative boundaries for every country, down to municipality level. The standard reference for GIS work and spatial joins.
- Google Dataset SearchSearches dataset metadata across thousands of repositories. Use it to locate the source, then import that repository's documentation pages rather than raw data files.
- IPUMS InternationalCensus microdata from 100+ countries recoded into consistent variables. Free with registration; the variable documentation pages make useful sources.
- Kaggle DatasetsCommunity-uploaded datasets on nearly any topic. Import the dataset description and discussion pages for context; raw data files aren't notebook sources.
- Mendeley DataRepository of research datasets deposited alongside published papers. Handy for pulling the raw data behind a study you've already added to a notebook.
- NCAA StatisticsOfficial team and player numbers for US college sports, season by season. Export tables to CSV for upload rather than pasting the stats pages directly.
- Open Science FrameworkWhere researchers post preregistrations, preprints, and project files. Project pages often hold the materials and data a published paper leaves out.
- StatistaAggregated market and consumer statistics on tens of thousands of topics. Free tier shows headline charts; note the original source each chart cites.
- UCI ML RepositoryLong-running archive of benchmark datasets for machine learning. Each dataset page documents variables and provenance — import the page, not the raw CSV.
- UN DataOne search box over statistics from dozens of UN agencies — population, health, trade, development. A quick starting point for country-level figures.
- UNECE Transport StatisticsRoad, rail, and inland-waterway transport figures for Europe and nearby regions, served as PXWeb tables you can export to CSV.
- UNESCO Institute for StatisticsOfficial education, science, and culture indicators for most countries, including SDG tracking. Good grounding for cross-country education comparisons.
- Wolfram AlphaComputes answers to math, science, and factual queries rather than linking to pages. Better as a fact-checking sidekick than an importable source.
- ZenodoCERN-run repository where researchers deposit datasets, software, and reports with DOIs. Record pages and their attached PDFs both import easily.