A relator is a legal term that refers to a private person or entity who files a lawsuit on behalf of the government in exchange for receiving a portion of any recovery from the defendant. The term is most commonly used in the context of the False Claims Act (FCA), which allows private individuals to sue companies or individuals who have defrauded the government. If the lawsuit is successful, the relator receives a percentage of the damages awarded.

In addition to the FCA, the term "relator" is also used in other legal contexts. For example, in a qui tam action, the private party helping the government is called a relator. In this context, if the prosecution succeeds, the private party receives a portion of the reward.

The term "relator" also has a different meaning outside of the legal context. In the CliftonStrengths assessment, "Relator" is one of the 34 themes that Gallup has identified through decades of research. People who are exceptionally talented in the Relator theme enjoy close relationships with others and find deep satisfaction in working hard with friends to achieve a goal.