William Brantley Harvey, Sr. (June 5, 1893 – March 20, 1981) was an American lawyer and politician.

Harvey served as a medical corpsman in the United States Navy during World War I.

In 1923, he received his bachelor's and law degrees from University of South Carolina.

Harvey practiced law in Beaufort, South Carolina.

[1][2][3][4] His son was W. Brantley Harvey Jr., who also served in the South Carolina General Assembly.