Lavantia Densmore Douglass (March 1, 1827 – May 27, 1899) was an American social reformer associated with the Woman's Christian Temperance Union (WCTU).

[3] On October 4, 1853, she married Joshua Douglass[3] (or Douglas),[4] a young lawyer of Meadville, Pennsylvania, where she lived for the rest of her life until near the time of her death.

She arrived home from Europe on December 23, 1873, the day of the great Woman's Temperance Crusade, launched in Hillsboro, Ohio.

[6] Meadville was aroused by the great outpouring, and the following March, a mass meeting was called and a temperance organization effected.

[4] In the winter of 1898–99, she had had a surgical operation for a malignant growth and had recovered almost completely from its effects, when a little more than a week before her death, she broke one of her legs.