Law Search

Nov 24, 2020, updated Jul 26, 2021

UPDATE: Nowadays, I host an even fancier citation lookup tool at citation.link!


Type a legal citation into the box below, and I'll try to send you to whatever it references:


Law Search recognizes vaguely Bluebook-style citations to the following sources of law, plus a few others:

For a list of supported sources and their citation styles, see Sources of Law.

How it Works

Law Search is a JavaScript implementation of CiteURL, a framework I wrote to translate citations into URLs. For each body of law that Law Search recognizes, there is a CiteURL template that defines what a citation has to look like, what its relevant fields are (e.g. volume and page number), and how to construct a URL from those fields. You can find the full list of these templates, and the websites they link to, below.

When you type a citation into the search bar, Law Search tries to match your query against each of the templates. If your query looks like a valid citation to one of the supported sources of law, it translates the citation into a URL and sends you to that URL, whether it's actually valid or not.

The translation process occurs entirely in your browser, with no server-side logic or data collection. In fact, if you want to, you can even download this page and run it without connecting to my website; you'll just miss out on updates.

Two final notes for the more technically-inclined: First, Law Search is essentially a stripped-down version of CiteURL, which can not only look up individual citations, but can also insert hyperlinks for every longform or shortform citation it finds in a document. Second, if you need to look up citations that Law Search doesn't support, it's not too hard to make your own personal instance of Law Search.

You're totally welcome to use Law Search by coming to my site and typing your citation into the search bar whenever you want to look something up. But it's more convenient if you can set up a search keyword so that you can just type something like "ls 42 usc 1983" in your URL bar to look up the law.

To do that on Firefox, you can just right-click the search bar at the top of this page, and click Add a Keyword for this Search....

On Chrome, go to Settings > Manage Search Engines. From there, click Add, and paste this address into the URL field:

For other browsers, you can follow this guide.

Sources of Law

Law Search supports the U.S. Code and Code of Federal Regulations, most pre-2018 state and federal court cases, and nearly every state's constitution and codified laws. It also supports a few federal rules and administrative materials like the Federal Register, as well as a few specific federal statutes like the National Labor Relations Act and the Immigration and Nationality Act.

Here's some information on the sites that Law Search links to most frequently:

Finally, here's a complete list of all the supported bodies of law, in no particular order. If you're wondering what a citation to each source needs to look like, you can click view regex to see a diagram:

Source of Law Website Citation Format
U.S. Caselaw (CAP) cite.case.law view regex
U.S. Caselaw (CourtListener) www.courtlistener.com view regex
National Labor Relations Board Decisions www.nlrb.gov view regex
National Labor Relations Board Slip Opinions www.nlrb.gov view regex
U.S. Constitution constitution.congress.gov view regex
U.S. Constitution Amendments constitution.congress.gov view regex
U.S. Code www.law.cornell.edu view regex
U.S. Public Laws uscode.house.gov view regex
U.S. Statutes at Large www.govinfo.gov view regex
Federal Register www.federalregister.gov view regex
Code of Federal Regulations ecfr.federalregister.gov view regex
Federal Rules of Civil Procedure www.law.cornell.edu view regex
Federal Rules of Appellate Procedure www.law.cornell.edu view regex
Federal Rules of Criminal Procedure www.law.cornell.edu view regex
Federal Rules of Evidence www.law.cornell.edu view regex
Immigration & Nationality Act www.law.cornell.edu view regex
Internal Revenue Code www.law.cornell.edu view regex
Treasury Regulations ecfr.federalregister.gov view regex
National Labor Relations Act www.law.cornell.edu view regex
Endangered Species Act www.law.cornell.edu view regex
Clean Air Act www.law.cornell.edu view regex
Clean Water Act www.law.cornell.edu view regex
Fair Housing Act www.law.cornell.edu view regex
Americans With Disabilities Act www.law.cornell.edu view regex
Code of Alabama, 1975 alisondb.legislature.state.al.us view regex
Alabama Constitution ballotpedia.org view regex
Alaska Statutes www.akleg.gov view regex
Alaska Constitution ballotpedia.org view regex
American Samoa Code new.asbar.org view regex
American Samoa Constitution ballotpedia.org view regex
Arkansas Constitution ballotpedia.org view regex
Arizona Revised Statutes www.azleg.gov view regex
Arizona Constitution ballotpedia.org view regex
California Codes leginfo.legislature.ca.gov view regex
California Constitution leginfo.legislature.ca.gov view regex
California Code of Regulations govt.westlaw.com view regex
Colorado Revised Statutes leg.colorado.gov view regex
Colorado Constitution ballotpedia.org view regex
General Statutes of Connecticut www.lawserver.com view regex
Connecticut Constitution ballotpedia.org view regex
Delaware Code www.lawserver.com view regex
Delaware Constitution ballotpedia.org view regex
Delaware General Corporations Law www.lawserver.com view regex
District of Columbia Official Code code.dccouncil.us view regex
Florida Statutes www.flsenate.gov view regex
Florida Constitution www.flsenate.gov view regex
Hawaii Revised Statutes www.lawserver.com view regex
Hawaii Constitution ballotpedia.org view regex
Idaho Code legislature.idaho.gov view regex
Idaho Constitution ballotpedia.org view regex
Illinois Compiled Statutes www.ilga.gov view regex
Illinois Constitution ballotpedia.org view regex
Indiana Code iga.in.gov view regex
Indiana Constitution ballotpedia.org view regex
Iowa Code www.legis.iowa.gov view regex
Iowa Constitution ballotpedia.org view regex
Kansas Statutes www.lawserver.com view regex
Kansas Constitution ballotpedia.org view regex
Kentucky Revised Statutes www.lawserver.com view regex
Kentucky Constitution apps.legislature.ky.gov view regex
Louisiana Statutes www.lawserver.com view regex
Louisiana Constitution ballotpedia.org view regex
Maine Statutes legislature.maine.gov view regex
Maine Constitution ballotpedia.org view regex
Maryland Code mgaleg.maryland.gov view regex
Maryland Constitution ballotpedia.org view regex
Massachusetts General Laws malegislature.gov view regex
Massachusetts Constitution malegislature.gov view regex
Michigan Compiled Laws legislature.mi.gov view regex
Michigan Constitution ballotpedia.org view regex
Minnesota Statutes www.revisor.mn.gov view regex
Minnesota Constitution ballotpedia.org view regex
Mississippi Code law.justia.com view regex
Mississippi Constitution ballotpedia.org view regex
Missouri Revised Statutes revisor.mo.gov view regex
Missouri Constitution ballotpedia.org view regex
Montana Code www.lawserver.com view regex
Montana Constitution ballotpedia.org view regex
Revised Statutes of Nebraska www.nebraskalegislature.gov view regex
Nebraska Constitution ballotpedia.org view regex
Nevada Revised Statutes www.leg.state.nv.us view regex
Nevada Constitution ballotpedia.org view regex
New Hampshire Revised Statutes www.lawserver.com view regex
New Hampshire Constitution ballotpedia.org view regex
New Jersey Statutes njlaw.rutgers.edu view regex
New Jersey Constitution ballotpedia.org view regex
New Mexico Statutes Annotated 1978 nmonesource.com view regex
New Mexico Constitution ballotpedia.org view regex
Consolidated Laws of New York www.nysenate.gov view regex
New York Constitution ballotpedia.org view regex
North Carolina General Statutes www.ncleg.gov view regex
North Carolina Constitution ballotpedia.org view regex
North Dakota Century Code www.lawserver.com view regex
North Dakota Constitution ballotpedia.org view regex
Northern Mariana Islands Commonwealth Code cnmilaw.org view regex
Northern Mariana Islands Constitution ballotpedia.org view regex
Ohio Revised Code codes.ohio.gov view regex
Ohio Constitution ballotpedia.org view regex
Oklahoma Statutes law.justia.com view regex
Oklahoma Constitution ballotpedia.org view regex
Oregon Revised Statutes www.oregonlaws.org view regex
Oregon Constitution ballotpedia.org view regex
Pennsylvania Consolidated Statutes law.onecle.com view regex
Pennsylvania Code www.pacodeandbulletin.gov view regex
Pennsylvania Constitution ballotpedia.org view regex
Puerto Rico Constitution ballotpedia.org view regex
General Laws of Rhode Island webserver.rilin.state.ri.us view regex
Rhode Island Constitution ballotpedia.org view regex
South Carolina Code of Laws www.scstatehouse.gov view regex
South Carolina Constitution ballotpedia.org view regex
South Dakota Codified Laws sdlegislature.gov view regex
South Dakota Constitution ballotpedia.org view regex
Tennessee Code www.lawserver.com view regex
Tennessee Constitution ballotpedia.org view regex
Texas Codes statutes.capitol.texas.gov view regex
Texas Constitution statutes.capitol.texas.gov view regex
Utah Code le.utah.gov view regex
Utah Constitution ballotpedia.org view regex
Vermont Statutes www.lawserver.com view regex
Vermont Constitution ballotpedia.org view regex
Virginia Code law.lis.virginia.gov view regex
Virginia Constitution ballotpedia.org view regex
Virgin Islands Code law.justia.com view regex
Revised Code of Washington app.leg.wa.gov view regex
Washington Constitution ballotpedia.org view regex
West Virginia Code www.wvlegislature.gov view regex
Wisconsin Statutes docs.legis.wisconsin.gov view regex
Wisconsin Constitution ballotpedia.org view regex
Wyoming Statutes wyoleg.gov view regex
Wyoming Constitution ballotpedia.org view regex
Uniform Commercial Code www.law.cornell.edu view regex

If you find an issue with one of these, or if there's a source of law you'd like to see added, please open a ticket here!


By the way, if you get a lot of use out of Law Search and want to support the project, you can use the link below: