Oren Ethelbirt Long (March 4, 1889 – May 6, 1965) was an American politician who served as the tenth Territorial Governor of Hawaii from 1951 to 1953.

After statehood was achieved he served in the United States Senate, one of the first two, along with Hiram Fong, to represent Hawaii in that body.

He was appointed Governor of the Territory of Hawaii by President of the United States Harry Truman in 1951 and served until 1953.

On July 28, 1959 he was elected to one of the two Senate seats from the newly formed State of Hawaii, and took office on August 21, 1959.

Long chose not to run for a full six-year term in 1962, and was succeeded by fellow Democrat and then-Rep. Daniel Inouye, in January 1963.