Tap any paragraph to write a margin note. Your notes collect in the Desk below the text and file under cases with @. The side-by-side margin rail opens on a larger screen.

primary sources

The Code, in one place.

3,891,501 documents across 62 sources. Citations between them are traced and clickable, even across sources.

shelves under construction

The other half of the library.

The federal floor is open. These wings are framed but not yet stocked.

Read the full plan →
coming soon

Federal caselaw

Supreme Court and circuit opinions wired into the sections they interpret, with the holdings pulled to the top.

coming soon

Citation graph

Every section shows what cites it and what it depends on — a real map between statutes, regulations, and agency manuals.

on the wishlist

Historical versions

Slide back through every prior version of any section. See exactly what changed, and which Public Law did it.

★   the supreme law of the land   ★
Don't Tread on Me
E Pluribus Unum — out of many, one

"If you don't know your rights, you don't have any."

Marginalia · a citizen's law index
A research desk, not legal advice. Always read the cited source before relying on a summary.
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disclaimerMarginalia is a research index, not a law firm. Nothing on this site is legal, tax, or financial advice and no attorney–client relationship is formed by using it. Statutes, regulations, and case law change; summaries, search results, AI output, and member posts may be incomplete, out of date, or wrong. Any interpretation drawn from material on this site should be validated by a licensed attorney in your jurisdiction before you act on it.