Margaret McCoubrey (1880–1956) was a Belfast-based Irish suffragist, pacifist, and an activist in the cooperative and labour movements.

There, in 1910 she joined the Irish Women's Suffrage Society (established in the city by Isabella Tod in 1872), and was an active militant alongside Elizabeth McCracken (the writer "L.A.M.

[4] At the outbreak of the First World War, she and McCracken disagreed with the WSPU's orders to cease agitation, and instead founded a branch of the Irish Women's Franchise League in Belfast.

[2] At that time, the majority of women in Ulster perceived pacifism as unpatriotic and female suffrage as unimportant in comparison with the dangers threatening wartime Europe.

[2] In 1924, the BLP became in turn the Northern Ireland Labour Party (NILP) which desisted from taking any decided position on the "national" or "constitutional question"--i..e. on whether Northern Ireland, as constituted in 1920, should remain part of the United Kingdom or join with the Irish Free State.