Warner Miller (August 12, 1838 – March 21, 1918) was an American businessman and politician from Herkimer, New York.

He enlisted for the American Civil War as a private in the Union Army's 5th New York Cavalry Regiment.

His invention of machines for inexpensively making paper from wood pulp made him wealthy, and he later became active in other businesses, including railroads, insurance, and mining.

After serving one full term and one partial, he resigned from the U.S. House in order to accept election to the U.S. Senate.

He died in New York City on March 21, 1918, and was buried at Oak Hill Cemetery in Herkimer.

[1] He attended the common schools of Oswego County and Charlotteville Academy, then became a teacher of Latin and Greek at the Collegiate Institute of Fort Edward, New York.

[4] Miller maintained a lifelong association with Union College; in 1886, he received the honorary degree of LL.D.

[5][6] In October 1861, Miller joined the military for the American Civil War, enlisting as a private in Company I, 5th New York Cavalry Regiment.

[3] He engaged in a scientific study of papermaking, including a trip to Belgium to observe paper being made from straw.

[11] Miller's other ventures included serving on the board of directors of the Traders Fire Insurance Company[12] and the St. Louis, Emporia and Denver Rail Road.

[16] During his House service, Miller was a member of the committees on Engrossed Bills, Insurance, Railways and Canals, and Ways and Means.

[17] They assumed they would quickly be reelected by the New York State Legislature, which would strengthen their position with respect to the patronage dispute.

[21] After 17 ballots failed to produce a nominee, Morton asked his supporters to back Hiscock, thus ensuring that Miller would be defeated.

[23] In 1894, Miller was again a candidate for governor, but Platt succeeded in obtaining the Republican nomination for Levi P. Morton, who won the general election.