The Cathedral of All Saints is a cathedral church in the city of Derby, Derbyshire, England. It is the seat of the Bishop of Derby.
The church was founded in the mid-10th century as a royal collegiate church. It became a cathedral in 1927. The main body of the church as it stands today is a Neoclassical rebuilding by James Gibbs, completed in 1725. The tower dates from the 16th century, and a retrochoir was added in the 20th century.