Siri Ulvestad (born 30 September 1988) is a Norwegian orienteering competitor and cross-country skier. She is a two-time Junior World Orienteering Champion.
Ulvestad competed at the 2007 Junior World Orienteering Championships in Dubbo, where she received a gold medal in the long distance and a gold medal in the relay event.
She participated at the 2007 Nordic Championships for juniors in Bornholm, where she received a gold medal in the sprint distance.