Hilma Gabriella Jahnsson (3 February 1882 in Hägg, Turku – 11 June 1975) was a Finnish lawyer. She was best known for her husband, professor Yrjö Jahnsson, as the founder of the foundation of her spouse.[1] As Secretary of the Parliamentary Committee on Labor Affairs, she served in 1917–1930 and was also a party candidate for the Social Democratic Party in the 1933 parliamentary elections. She was the third female jurist in Finland.[2]