Kleptocracy (from Greek κλέπτης kléptēs, "thief", κλέπτω kléptō, "I steal", and -κρατία -kratía from κράτος krátos, "power, rule") is a government whose corrupt leaders (kleptocrats) use political power to expropriate the wealth of the people and land they govern, typically by embezzling or misappropriating government funds at the expense of the wider population. Thievocracy means literally the rule by thievery and is a term used synonymously to kleptocracy. One feature of political-based socioeconomic thievery is that there is often no public announcement explaining or apologizing for misappropriations, nor any legal charges or punishment levied against the offenders.

Kleptocracy is different from plutocracy (rule by the richest) and oligarchy (rule by a small elite). In a kleptocracy, corrupt politicians enrich themselves secretly outside the rule of law, through kickbacks, bribes, and special favors from lobbyists and corporations, or they simply direct state funds to themselves and their associates. Also, kleptocrats often export much of their profits to foreign nations in anticipation of losing power.

According to the "Oxford English Dictionary", the first use in English occurs in the publication "Indicator" of 1819: "Titular ornaments, common to Spanish kleptocracy."