Horace Sumner Lyman (December 18, 1855 – December 22, 1904) was a prominent American journalist, historian, and educator in the U.S. state of Oregon.

[1] His father, Horace Lyman, was an Oregon pioneer in 1848.

Lyman served as editor of the Portland Pacific Express starting in 1885[2] and the Prohibition Star beginning in 1887.

[1] He contributed a number of firsthand accounts of Oregon pioneers to the Oregon Historical Quarterly, and published a history of the state in four volumes.

This Oregonian biographical article is a stub.