Isabella Maria Susan Tod (18 May 1836 – 8 December 1896) was a Scottish-born campaigner for women’s civil and political equality, active in the north of Ireland.

[8] Determined lobbying by Tod and her society ensured that in creating a municipal franchise for the new "city" of Belfast, the 1887 Act (guided through Parliament by Johnston) conferred the vote on persons rather than men.

[12] They campaigned, with success in 1886, for the repeal of the Acts,[13] on the grounds that the legislative attempt to protect the health of soldiers forced medical examinations upon prostitutes that violated the women's civil liberties.

[14] She believed "that petty legislature of the character which would be inevitable" under home rule would block further advances for women:[16] "I perceived that [it] would be the stoppage of the whole work of social reform for which we had laboured so hard".

[19] In October 2013 Margaret Mountford presented a BBC Two Northern Ireland documentary called Groundbreakers: Ulster's Forgotten Radical, which highlighted the life of Isabella Tod.