Lucia Ames Mead (May 5, 1856 – November 1, 1936) was an American pacifist, feminist, writer, and educator based in Boston, Massachusetts.

She worked for the establishment of a "Peace Day" holiday to be marked in schools on May 18, writing curriculum materials and giving conference talks on her ideas.

[8] Books by Lucia Ames Mead include Great Thoughts for Little Thinkers (1888), Memoirs of a Millionaire (1889, a novel),[9] To Whom Much is Given (1898),[10] Milton's England (1903),[11] Patriotism and the New Internationalism (1906),[12] Patriotism and Peace: How to Teach them in Schools (1910),[13] Swords and Ploughshares (1912),[14] Economic Facts for Practical People (1914), What Young People Ought to Know about War and Peace (1916),[15] and Law or War (1928).

[16] She also edited The Overthrow of the War System (1915), which contained essays by Jane Addams, Emily Greene Balch, Fannie Fern Andrews, and others.

[21] Mead's niece Mary Dennett (her sister Livonia's daughter) became an outspoken feminist and family planning advocate.