上议院（House of Lords），直译贵族院，是英国国会的上院（upper house）。英国国会同时也由英国君主与下议院（British House of Commons，直译庶民院）组成。上议院有大约700多名非选举产生之议员，当中包括英国国教会的26名大主教或主教（即「灵职议员」，英文为Lords Spiritual）以及600多名贵族（即「俗职议员」，英文为Lords Temporal）。灵职担任者于其保有神职身份时续任，而俗职为终身职。

上议院始创于14世纪，1544年始用「上议院」（House of Lords）之名。1649年曾一度遭到由英国内战取得政权的革命政府废止，复于1660年恢复。上议院之权力曾一度凌驾由选举产生的下议院。然而，自19世纪以来，上议院之权势逐渐凌夷，至今已远不如由选举产生之下议院。据1911年至1949年间通过的多条国会法令规定，除包括预算案在内之各种拨款案外，所有由下议院通过的法令最多可于上议院搁置十二个月，但不可驳回。这项权力于政治学中称为延宕性否决（suspensive veto）。据由《1999年上议院法令》（House of Lords Act 1999）所制定进行的革新，世袭贵族的席位予以废除，仅保留两席给国务重臣（Great Officers of State），以及另外90席由选举产生之贵族代表（representative peer）。现今的联合政府正审慎考虑作进一步革新，但尚未通过成为法律。

The House of Lords is the upper house of the Parliament of the United Kingdom. Like the House of Commons, it meets in the Palace of Westminster.

Unlike the elected House of Commons, most members of the House of Lords are appointed. The membership of the House of Lords is made up of Lords Spiritual and Lords Temporal. The Lords Spiritual are 26 bishops in the established Church of England. Of the Lords Temporal, the majority are life peers who are appointed by the monarch on the advice of the Prime Minister, or on the advice of the House of Lords Appointments Commission. However, they also include some hereditary peers including four dukes. Membership was once an entitlement of all hereditary peers, other than those in the peerage of Ireland, but under the House of Lords Act 1999, the right to membership was restricted to 92 hereditary peers. Very few of these are female since most hereditary peerages can only be inherited by men.