William Nathanial Davenport (November 3, 1856 – January 28, 1933) was a Massachusetts, USA, politician who sat in both branches of the Massachusetts legislature,[1] and was the fourth mayor of Marlborough, Massachusetts.

Davenport was born in Boylston, Massachusetts, on November 3, 1856, as the son of Almira J. Howard and William J.

[2] In 1887, he married Elizabeth Moore "Lizzie" Kendall (1862–1957).

[1] They lived in Marlborough and Worcester, Massachusetts.

In 1887, he succeeded John O'Connell as the fourth mayor of Massachusetts.