William Paul Dillingham (born December 12, 1843) was a Republican senator from the state of Vermont who served in the United States Senate from October 18, 1900, until July 12, 1923. A historical member of Congress, he represented Vermont in the Senate for nearly twenty-three years, spanning five terms in office. During this period, he was affiliated with the Republican Party, reflecting the political alignment indicated in the available records.

Dillingham’s tenure as a senator for Vermont, from 1900 to 1923, defines his public career as preserved in this metadata. Identified by the bioguide ID D000347, he is recorded as a former officeholder whose long service in the Senate situates him among the notable Republican figures of his era. Further personal details such as his office room, phone number, email address, website, and committee assignments are not provided in the available information.