Johanna Asklöf (née Tiira) is a Finnish orienteering competitor and World champion.
She received a silver medal in the relay event at the 1993 World Orienteering Championships in West Point, USA, together with Kirsi Tiira, Annika Viilo and Eija Koskivaara. She earned a silver medal with the Finnish relay team at the 1999 World Championships in Inverness, and also an individual bronze medal on the Classic distance. She won a gold medal at the 2001 World Orienteering Championships in Tampere with the Finnish relay team, and received a silver medal on the Sprint distance.
She became Junior World Champion with the Finnish relay team in 1991.