Heman Conomon Smith (September 27, 1850 – April 17, 1919) was a leader in and official historian of the Reorganized Church of Jesus Christ of Latter Day Saints (RLDS Church, now the Community of Christ).

His grandfather was Lyman Wight, one of the original apostles of the Church of Christ established by Joseph Smith, Jr. After Joseph Smith's death, the church divided into several groups, one of which Wight led to Texas.

In 1858, Heman's family left Texas, and they eventually settled in Shelby County, Iowa.

Smith was a Seventy and an RLDS missionary in Iowa, Indiana, Illinois, Michigan, Louisiana, Arkansas, Florida, Kentucky, Tennessee, Mississippi, Texas, Indian Territory, and eastern Canada.

During 1897 and 1898, Smith oversaw the RLDS Church mission in England and Wales.