The National Federation of Social Democratic Women in Sweden (Sveriges Socialdemokratiska Kvinnoförbund, or "S-kvinnor", "S-women") is the women's wing of the Swedish Social Democratic Party. It was established in 1920, by representatives from 120 women’s clubs from all over Sweden. The most important reason for the funding of a national women’s league was to promote and activate women and to get power to pursue politics for women.
Its chairman is Lena Sommestad.