Denov is a city in Surxondaryo Region of southeast Uzbekistan, the administrative centre of Denov District. It is in the Hissar Range close to the border with Tajikistan, and is the closest major town to the Kalchayan and Dalverzin Tepe archaeological sites. Denov is believed to be the site of ancient city of Chaghaniyan.

Surxondaryo Region, old spelling Surkhandarya Region is a region (viloyat) of Uzbekistan, located in the extreme south-east of the country. Established on March 6, 1941, it borders on Qashqadaryo Region internally, and Turkmenistan, Afghanistan and Tajikistan externally, going anticlockwise from the north. It takes its name from the river Surxondaryo, that flows through the region. It covers an area of 20,100 km². The population is estimated at 2,743,201, with 80% living in rural areas. According to official data, 83% of the population are Uzbeks and 12,5% Tajiks, but several sources argue that the Tajik population might be significantly higher in this region , as well as in Samarkand and Bukhara. The highest point of the Region and also of Uzbekistan is Khazrati Sulton peak reaching 4,643 m/15,233 ft in Gissar Range.