Ella Alexander Boole (July 26, 1858 – March 13, 1952) was an American temperance movement leader and social reformer.

Her father was a prominent lawyer, who edited a free soil newspaper and supported reforms during Reconstruction following the Civil War.

After the death of Boole's husband, she was able to support her family through an inheritance from her father and income from her speaking engagements and temperance activities.

She held this position until 1925, with the exception of a six-year period when she was corresponding secretary of the Woman's Board of Home Missions of the Presbyterian Church (1903-1909).

[4] One of her key activities was in shifting WCTU work away from its emphasis on collecting petitions, and towards direct lobbying of legislators.