Deh Kahan (, also Romanized as Deh Kahān, Deh-e Kahān, Deh-e Kāhn, and Deh Kahn; also known as Deh Kahnū and Deh Kehnu) is a city in the Central District of Kahnuj County, Kerman province, Iran.
At the 2006 census, its population was 1,103 in 235 households, when it was a village in Aseminun District of Manujan County. The following census in 2011 counted 4,505 people in 1,114 households, by which time the rural district had been separated from the county and joined Kahnuj County. The latest census in 2016 showed a population of 3,787 people in 1,105 households. After the census, the village was elevated to the status of a city.