Case citation is a system used by legal professionals to identify past court case decisions, either in series of books called reporters or law reports, or in a neutral style that identifies a decision regardless of where it is reported. Case citations are formatted differently in different jurisdictions, but generally contain the same key information.

A legal citation is a "reference to a legal precedent or authority, such as a case, statute, or treatise, that either substantiates or contradicts a given position". Where cases are published on paper, the citation usually contains the following information:

In some report series, for example in England and Australia, volumes are not numbered independently of the year: thus the year and volume number (usually no greater than 4) are required to identify which book of the series has the case reported within its covers. In such citations, it is usual in these jurisdictions to apply square brackets "[year]" to the year (which may not be the year that the case was decided: for example, a case decided in December 2001 may have been reported in 2002).