Joseph Norton Dolph (October 19, 1835 – March 10, 1897) was an American politician and attorney in the state of Oregon.

[3] Dolph earned his education at local public and private schools and then attended the Genesee Wesleyan Seminary in Lima.

[5] In 1866, Dolph was elected to the Oregon State Senate as a Republican representing Multnomah County.

In 1882, he was elected to the United States Senate by the Oregon Legislative Assembly in a contest that drew national attention.

[2] Upon leaving the Senate, he moved back to Portland where he returned to the practice of law, and over the years had been partners with many high-profile Portland lawyers including Joseph Simon, John H. Mitchell, Rufus Mallory, Charles B. Bellinger, and even his brother Cyrus.

[2] The former town of Dolph, in Tillamook County in the Northern Oregon Coast Range was named after the Senator.