The Ranfurly Shield went through 10 challenges in the 2009 season, changing hands twice, and was held by Southland at the conclusion of the season.

The Ranfurly Shield, colloquially known as the Log o' Wood, is a trophy in New Zealand's domestic rugby union competition. First played for in 1904, the Shield is based on a challenge system. The holding union must defend the shield in challenge matches, which are usually played at the shield holder's home venue, and if the challenger is successful in their challenge they will become the new holder of the Shield. There is a tradition for the first challenges of a new rugby season to be played against smaller associations from the Heartland Championship.