Guri Tambs-Lyche (20 September 1917 – 13 March 2008) was a Norwegian activist for international solidarity and women's rights.
During the occupation of Norway by Nazi Germany she was a member of the resistance movement, as was her husband Wilhelm.
After the war she first joined the Communist Party of Norway, and wrote in Friheten, but she was excluded in the aftermath of the Peder Furubotn case.
After the death of her husband she lived in Sweden for seven years, then in Norway again where she rejoined the Communist Party.
After the disbanding of Norsk Kvinneforbund, she became a prominent member in the national branch of the Women's International League for Peace and Freedom.