Johanna "Jo" Westerman[1] (15 December 1866 – 2 July 1943) was a Dutch teacher, politician, and feminist.

She attended the three-year Hogere Burgerschool and the kweekschool and obtained various teaching certificates.

[1] From 1886 she worked in various positions in education and published occasionally columns in De Sumatra Post.

[1] From 1921 to 1933, Westerman was a member of the House of Representatives, initially for the Economic League, and from 1925 for the Liberal State Party.

[4][5] After 1933, Westerman was still a board member, and ultimately president of the Dutch Women's Council.