The Ultimate Kansas is the fourth compilation from the band Kansas. It was originally released in 2002, and focuses solely on their Kirshner period from their debut album Kansas in 1974, up to and including Drastic Measures in 1983. The collection was rereleased in 2008 under the title Essential Kansas 3.0 as part of the Sony/BMG Legacy series of that name, with an additional "bonus disc" with six additional songs, and featuring "eco-friendly" packaging.

Personnel:
Phil Ehart: drums
John Elefante: keyboards, vocals
Dave Hope: bass guitar
Kerry Livgren: guitars, keyboards
Robby Steinhardt: violin
Steve Walsh: keyboards, vocals
Rich Williams: guitar