Lords Spiritual (Women) Act 2015

The Lords Spiritual (Women) Act 2015 (c. 18) is an act of Parliament of the United Kingdom. It states that whenever a vacancy arises among the Lords Spiritual during the next ten years after the act comes into force, the position has to be filled by a woman, if there is one who is eligible. In this case, the act supersedes section 5 of the Bishoprics Act 1878 (41 & 42 Vict. c. 68), which would otherwise require "the issue of a writ of summons to that bishop of a see in England who having been longest bishop of a see in England has not previously become entitled to such writ". It does not apply to the five sees of Canterbury, York, London, Durham or Winchester, which are always represented in the House of Lords.

The act was passed half a year after the Bishops and Priests (Consecration and Ordination of Women) Measure 2014 authorised the Church of England to appoint women as bishops.

In 2024, the Labour Starmer ministry government introduced a bill to Parliament to extend the act's provisions by five more years (until 18 May 2030). The Lords Spiritual (Women) Act 2015 (Extension) Act 2025 (c. 1) received royal assent on 16 January 2025.