Electronic Code of Federal Regulations (e-CFR)
The e-CFR is an editorial compilation of CFR material and Federal Register amendments produced by the National Archives and Records Administration's Office of the Federal Register (OFR) and the Government Printing Office. The OFR updates the material in the e-CFR on a daily basis. It is a currently updated version of the Code of Federal Regulations (CFR). It is not an official edition of the CFR.
Code of Federal Regulations govinfo (GPO)
CFR from 1997 - present (select Titles from 1996 also available). Can Browse by year and title. To search the CFR, click the orange "Search" button, select "Advanced", then under "Refine by Collection" select "Code of Federal Regulations". Search results can be further refined by using the side panel on the search results screen. For additional information and tips, see the About the Code of Federal Regulations page. CFR Index and Finding Aids (2017-present) and List of CFR Sections Affected (1997-present) also available.
Code of Federal Regulations Library of Congress
CFR from 1938 - 1969. Can browse by Edition and Supplements and by Title. Includes Preliminary and Index Material, Tables and Finding Aids.
Some government agency websites link to or list relevant CFR sections. A selection of these websites is listed below.
For a complete list of federal agencies with links to their websites, see A-Z Index of U.S. Government Departments and Agencies from USA.gov.