Sacred Harp singing is a tradition of sacred choral music that originated in New England and was later perpetuated and carried on in the American South. The name is derived from The Sacred Harp, a ubiquitous and historically important tunebook printed in shape notes. The work was first published in 1844 and has reappeared in multiple editions ever since. Sacred Harp music represents one branch of an older tradition of American music that developed over the period 1770 to 1820 from roots in New England, with a significant, related development under the influence of "revival" services around the 1840s. This music was included in, and became profoundly associated with, books using the shape note style of notation popular in America in the 18th and early 19th centuries.

Shape notes are a musical notation designed to facilitate congregational and social singing. The notation, introduced in late 18th century England, became a popular teaching device in American singing schools. Shapes were added to the noteheads in written music to help singers find pitches within major and minor scales without the use of more complex information found in key signatures on the staff.