Constance Miriam Purdue MBE (née Soljak, 23 May 1912 – 16 March 2000) was a New Zealand trade unionist.

[2] During the 1930s, Purdue was a member of the Young Communists League, sold their newspapers and even distributed material about sex education, before moderating her views on social democracy and industrial relations, and joining the New Zealand Labour Party and the Auckland Clerical Workers Union of which she was a delegate and an organiser.

After liberal Catholic novelist Daphne de Jong and others established Feminists for Life in New Zealand, Purdue became an early member.

During the 1970s and 1980s, Purdue campaigned against incorporation of feminist objectives within the trade union movement in the Working Women's Charter, attacked Māori moves toward reclamation of their land, language and culture, opposed homosexual law reform, and became involved in an ultimately unsuccessful campaign to prevent New Zealand ratification of the United Nations Convention on the Elimination of All Forms of Discrimination Against Women.

In the 1975 Queen's Birthday Honours, Purdue was appointed a Member of the Order of the British Empire, for community and public services.