Marja Liisa Autti (née Portin; born 5 January 1966) is a Finnish orienteering competitor.

She won a bronze medal in the relay event at the 1989 World Orienteering Championships in Skövde, together with Ulla Mänttäri, Annika Viilo and Eija Koskivaara.

She debuted in 1984 in Balsfjord Municipality, Norway, where she placed 5th in women's junior class and received a bronze medal in women's junior relay event together with Annika Heino, Ulla Mänttäri and Tiina Äijälä.

1992 in Rena, Norway she received a bronze medal in women's senior relay event together with Kirsi Tiira, Annika Viilo and Eija Koskivaara.

[4] Marja Liisa received a Master of Science degree in Electronic Engineering from Helsinki University of Technology in 1991, and works as a Patent Attorney at Boco IP.