Hannu Markus Virta (born March 22, 1963, in Turku, Finland) is a retired Finnish professional ice hockey defenceman.

He was named the best defenceman in the Finnish Elite League (SM-liiga) four times, and was a five-time all-star.

He played 245 National Hockey League games with the Sabres over five seasons, scoring 25 goals and adding 101 assists.

As an adult, he won a bronze medal at the 1994 Winter Olympics playing for Finland's national ice hockey team.

He played at seven IIHF World Championships, winning gold in 1995 and silver in 1994, and leading the tournament in assists in 1996.