The diocesan governor of Kristiansand stiftamt was a government agency of the Kingdom of Norway.
The title was Stiftamtmann (before 1919) and in 1919 all stiftamt were abolished in favor of equal counties (Norwegian: fylker).
The seat of the stiftamt and diocese originally was the city of Stavanger.
In 1682, the seat of the stiftamt was moved from Stavanger to Christianssand, a much more centralized location.
In 1877, the spelling of the name was changed to Kristianssand stiftamt to reflect one of the Norwegian language reforms.