1886 Revelation

In the Mormon fundamentalist movement, the 1886 Revelation is the text of a revelation received by John Taylor, third President of the Church of Jesus Christ of Latter-day Saints (LDS Church), on 27 September 1886, which restated the permanence of the principle of plural marriage. Along with Joseph Smith's 1843 revelation on plural marriage, the 1886 revelation is one of the primary documents used by Mormon fundamentalists to justify their continued practice of polygamy.

The LDS Church issued a "manifesto" in 1890 to end official church sanction of new plural marriages, and a second manifesto in 1904 to more forcefully terminate the practice of new plural marriages. The mainline LDS Church has often claimed that the 1886 revelation is not authentic, but also maintains that even if authentic, the revelation was never publicly announced nor adopted as binding by the full Church.

In June 2025, debate as to the authenticity and provenance of the revelation was settled, as the LDS Church History Catalog published the full text of the revelation, including facsimiles of the original materials in John Taylor's hand, which the Church has held in its archives since 1933. Along with the handwritten original revelation were further materials, including transcriptions of the revelation and a memo explaining how the First Presidency of Church came to receive the materials in 1933.