Martha Baker (April 9, 1838 in Concord, Indiana – September 18, 1918 in Rushville, Missouri) was a nurse in the American Civil War.

Martha Baker was born on April 9, 1838, to Benjamin and Anna Denton of Concord, Indiana.

Little is known about her early life except that she lived in Indiana, and attended Sugar Grove Institute at age 16.

[1] In February 1862, Abner Baker enlisted in the 40th Indiana Volunteers regiment to fight in the Civil War.

[1][2] In her letter to Mary G. Holland for Holland's book, Our Army Nurses: Stories from Women in the Civil War, Baker writes of the under-staffing issue that plagued hospitals of the Union and Confederacy during the Civil War.