Irina Fedotova-Fet and Irina Shipitko said the Tverskoi District Court cited that Russian law defined marriage as between a woman and a man.
"We want recognition of our relationship by society and the state. We are a family already, we live together and share household chores," Shipitko said. "We also would like to have children. That is why we want legal recognition of our union."
Nikolai Alexeyev, a Russian gay rights activist and also a women's lawyer said that they would be fighting the ruling.
"We understand quite well that it is a long road that must be taken before such unions will be recognized. But I have no doubt this recognition will come," he said.
The two women announced of flying to Canada to marry and then return to Russia.