The Swedish Women's Voluntary Defence Service (, commonly known as Lottorna) is an auxiliary defence organization of the Swedish Home Guard, a part of the Swedish Armed Forces. It was created in 1924 inspired by the Finnish women's auxiliary organization, Lotta Svärd founded in 1920. The name comes from a poem by Johan Ludvig Runeberg, about a fictional woman named Lotta Svärd who took care of wounded soldiers during the Finnish War.