世袭贵族（英语：Hereditary peer），英国其中一种贵族爵位。全国大约有八百个持有世袭头衔的贵族。大部分世袭贵族以前在上议院拥有席位。国会通过1999年上议院法令（House of Lords Act 1999）后，大部分世袭贵族都丧失了担任上议院议员的资格，只有九十二人保留了席位。世袭贵族可经特别的令状（Writ of summons）获传召到上议院议事。

具有世袭头衔者，不一定就是世袭贵族。举例而言，世袭头衔从男爵就并非世袭贵族的其中一个等级。相反，不具有世袭头衔的人，如终身贵族，也有可能是贵族。世袭贵族爵位通常由君主签发制诰创设，不过自1965年以来，英国只创设了六个新的世袭贵族爵位。

Hereditary peers form part of the Peerage in the United Kingdom. There are over eight hundred peers who hold titles that may be inherited. Formerly, most of them were entitled to sit in the House of Lords, but since the House of Lords Act 1999 was passed, only ninety-two are permitted to do so, unless they are also a life peer. Peers are called to the House of Lords with a writ of summons.