Hilda Augusta Tonning née Grönvall (1857–1932) was a Swedish schoolteacher and suffragist. Together with her husband Pär Tonning, from 1879 she taught at folk high schools, first in Fornby near Borlänge and then at the school they established in Falun. After her husband's death, in 1898 she set up a commercial vegetable garden near Ronneby. In 1902, she joined the women's movement and went on to establish a number of suffrage associations, actively campaigning for women's voting rights. During the First World War, she also supported efforts towards peace. Even after women received the right to vote in the 1920s, Tonning continued to support women's rights, giving courses at the property she had built near Ronneby, where she also offered hospitality to former suffragists.