Christian Ruud (born 24 August 1972) is a Norwegian former tennis player who turned professional in 1991.

39 in October 1995, reaching the fourth round of the 1997 Australian Open and the quarterfinals of the 1997 Monte Carlo Masters.

He was the highest-ranked Norwegian male player ever on the ATP Tour until his son Casper Ruud surpassed him in February 2020.

Ruud was born in Oslo and represented Norway at three consecutive Olympic Games, reaching the third round in Atlanta in 1996.

Ruud won twelve titles on the Challenger Series, but reached only one ATP Tour final, losing the 1995 Swedish Open in Båstad to Fernando Meligeni in straight sets.