1811年精神病人婚姻法令

《1811年精神病人婚姻法令》（英語：Marriage of Lunatics Act 1811）是在英國國王佐治三世在位期間實施的英國國會法令，旨在「防止精神病人結婚」（to prevent the marriage of Lunatics），並使法令生效日期之前、當日或之後所有與精神病人締結的婚姻，不論是否為婚前獲診斷，「就所有用意及目的而言，均屬作廢及無效」（null and void to all intents and purposes whatsoever）。

1811年精神病人婚姻法令
Marriage of Lunatics Act 1811

國會法令
英國國會
全名	本法令旨在進一步防止精神病人結婚。（An Act further to prevent the Marriage of Lunatics.）
日期
御准	1811年
廢止	2021年2月1日
其他法例
廢除法例	2015年受助作決定（行為能力）法令
現狀：已廢止

該法令內容如下：

Whereas an Act was made in the Parliament of Great Britain in the fifteenth year of the reign of his late Majesty King George the Second to prevent the marriage of lunatics: And whereas it is expedient that the provisions of the said Act should be extended to Ireland: Be it therefore enacted by the King’s most excellent Majesty, by and with the advice and consent of the lords spiritual and temporal, and commons, in this present Parliament assembled, and by the authority of the same, that from and after the expiration of ten days after the passing of this Act, in case any person who has been or at any time hereafter shall be found a lunatic by any inquisition taken or to be taken by virtue of a commission under the great seal of Great Britain or the great seal of Ireland respectively, or any lunatic or person under a phrenzy, whose person and estate by virtue of any Act of Parliament now or hereafter shall be committed to the care and custody of particular trustees, shall marry before he or she shall be declared of sane mind by the lord high chancellor of Great Britain or Ireland or the lord keeper or lords commissioners of the great seal of Great Britain or Ireland for the time being or such trustees as aforesaid or the major part of them respectively, as the nature of the case shall require, every such marriage shall be and is hereby declared to be null and void to all intents and purposes whatsoever.

2021年，該法令於《2015年受助作決定（行為能力）法令》（Assisted Decision-Making (Capacity) Act 2015）生效日期當日被完全廢除。