Kittitas County is a county located in the State of Washington. Its population is 33,362. There are numerous interpretations of the name, which is of Kittitas Indian origin. The county has a total area of 6,043 km² (2,333 mi²). 5,950 km² (2,297 mi²) of it is land and 93 km² (36 mi²) of it is water.