White Oak is a borough in Allegheny County, Pennsylvania, United States.

On March 21, 1948 a petition requesting the formation of White Oak Borough was submitted to the County Court.

On June 24, 1948, Judge Russell H. Adams signed the decree of incorporation of the new borough.

The first borough building was located at 860 Maple Street inside the old Bowery School.

The borough maintains its own police department consisting of twelve full-time officers and eight patrol cars.

Two volunteer fire departments serve the borough: White Oak VFC No.