Oscar S. Gill (April 3, 1880 – November 18, 1947) was an Alaskan Republican politician.
As the encampment at Ship Creek grew into the city of Anchorage, Gill put down roots, floating his two-story house down the Knik River to 918 W. 10th Avenue, where it remained until 1982.
From 1916-1923, Gill ran a lighterage service under contract with the Alaskan Engineering Commission.
His son, Victor Gill, made an unsuccessful bid to succeed him as Mayor of Anchorage in 1936.
The Oscar Gill House, threatened with demolition in 1982, was purchased by the Municipality of Anchorage and moved into storage.