Ira David Sankey (August 28, 1840 – August 13, 1908) was an American gospel singer and composer, known for his long association with Dwight L. Moody in a series of religious revival campaigns in America and Britain during the closing decades of the 19th century. Sankey was a pioneer in the introduction of a musical style that influenced church services and evangelical campaigns for generations, and the hymns that he wrote or popularized continued to be sung well into the 21st century.