William Paul Dillingham (December 12, 1843July 12, 1923) was an American attorney and politician from the state of Vermont. A Republican and the son of Congressman and Governor Paul Dillingham, William P. Dillingham served as governor from 1888 to 1890 and United States Senator from 1900 until his death. Dillingham was born in Waterbury, Vermont, in 1843, and attended schools in Vermont and New Hampshire. He studied law with his brother in law, Matthew Hale Carpenter, attained admission to the bar, and practiced in Waterbury and Montpelier. Groomed for a political career from an early age, Dillingham served as Secretary of Civil and Military Affairs (chief assistant to the governor) during his father's term and that of Asahel Peck, State's Attorney of Washington County, and member of the Vermont House of Representatives and Vermont State Senate. He was elected governor in 1888 and served one two-year term. In 1900, Dillingham won election to the United States Senate, replacing Jonathan Ross, who had been appointed as a temporary replacement following the death of incumbent Justin Smith Morrill. Dillingham served in the Senate until his death, and was chairman of several committees during his tenure. As head of a commission that studied immigration, he argued that southern and eastern European immigrants posed a threat to the country's stability and growth, and that immigration from those areas should be curbed in the future. Dillingham died in Montpelier in 1923 and was buried at Hope Cemetery in Waterbury. Early life The son of Governor Paul Dillingham, William P. Dillingham was born on December 12, 1843 in Waterbury, Vermont. He attended the public schools, Newbury Seminary in Montpelier, Vermont and Kimball Union Academy in Meriden, New Hampshire. In 1866 he served as Secretary of Civil and Military Affairs (chief assistant) during his father's governorship. He also studied law with his brother in law Matthew H. Carpenter and was admitted to the bar in 1867. Public service Dillingham practiced law in Waterbury. A Republican, he served as Washington County State's Attorney from 1872 to 1876. From 1874 to 1876 he was Secretary of Civil and Military Affairs (chief assistant) for Governor Asahel Peck. In 1876, Dillingham was elected to the Vermont House of Representatives. From 1878 to 1882 he served in the Vermont State Senate. Dillingham served as Vermont's Commissioner of Taxes from 1882 to 1888, and served another term in the Vermont House in 1884.