流氓国家（Rogue state）或称无赖政权，是一种国际外交政治概念，带有贬义。

流氓国家主要用来指集权体制、违背其他国家的愿望，试图获得其他国家设法控制的武器、对内或对外挑起其他国家憎恶的战争、进行反人类的罪行、窝藏恐怖份子、容许其他国家不容许的犯罪活动（如贩毒）、或者寻求颠覆或损害其他国家的政治实体。

美国政府曾经使用流氓国家一词十多年之久，用来称呼某些符合以上含义的国家，但自2000年开始，美国国务院开始使用“受关注的国家” (States of Concern)，代替流氓国家一词。

Rogue state is a controversial term applied by some international theorists to states they consider threatening to the world's peace. This means meeting certain criteria, such as being ruled by authoritarian regimes that severely restrict human rights, sponsor terrorism, and seek to proliferate weapons of mass destruction. The term is used most by the United States, though the US State Department officially stopped using the term in 2000. However, it has been applied by other countries as well.