William Tans'ur (or Tansur, Tanzer, Letansur) (6 November 1706, Dunchurch – 7 October 1783, St. Neots) was an English hymn-writer, composer of West gallery music, and teacher of music. His output includes approximately a hundred hymn tunes and psalm settings and a Te Deum. His manual A New Musical Grammar (1746) was still popular in the nineteenth century.
Tans'ur was born in Dunchurch, Warwickshire to Edward Tanzer, a labourer, and Joan Alibone. In 1730 he married Elizabeth Butler and moved to Ewell, near Epsom. They had at least two sons. He taught psalmody in various places in the south-east of England, before moving to St Neots in Cambridgeshire, where he worked as a bookseller and music teacher, and spent the last forty years of his life.
- A Compleat Melody, or The Harmony of Sion, 1734
- The Melody of the Heart, 1737
- Heaven on earth, or the Beauty of Holiness, 1738
- Sacred Mirth, or the Pious Soul's Daily Delight, 1739
- Poetical Meditations, 1740
- The Universal Harmony, containing the Whole Book of Psalms, 1743
- The Royal Melody Compleat, 1754–5 (8 editions, revised as The American Harmony, 1771)
- The Psalm Singer's Jewel, or Useful Companion to the Book of Psalms, 1760
- Melodia Sacra, or the Devout Psalmist's Musical Companion, 1771
- The Elements of Music Displayed, 1772
Influence on early American sacred music
For the most part the Yankee composer's source of information about harmonic practices derived from the music and writings on music of such comparatively unskilled English composers as William Tans'ur (1706-1783) and Aaron Williams (1731-1776), who were themselves somewhat outside the mainstream of European sacred music. Many of the traits that may be thought unique to American psalmodists in fact characterize the compositions of their British cousins too.