Alina Josefina Rosalie Jägerstedt (3 June 1858 – 3 November 1919) was a Swedish social democrat and trade unionist.
Her father, police officer Anders Johan Jägerstedt, died shortly after her birth, and her two brothers were placed in an orphanage (Stora Barnhuset) because her mother was unable to support all of her children as a widow.
Jägerstedt was a member of the union's board and several committees during the 1880s and 1890s, and it was in this capacity she participated in the congress of 1889, when the Swedish Social Democratic Party was founded.
In 1906, Jägerstedt was appointed member of the Communal Employment Agency in the city of Stockholm, and then referred to as the first working-class woman to be given a position in a municipal council.
When the Scandinavian Tobacco Worker's Union was nationalized in 1915, she was part of the committee of former members who negotiated compensation for those losing their positions, of which she herself was one.