Dashti County () is in Bushehr province, Iran. Its capital is the city of Khvormuj.
The village of Shonbeh was converted to a city in 2009, and the village of Baduleh rose to city status in 2012.
The people are Muslim and speak various forms of Persian languages, including Persian and the local Dashti.
At the time of the 2006 National Census, the county's population was 71,285 in 15,465 households. The following census in 2011 counted 77,530 people in 19,697 households. The 2016 census measured the population of the county as 86,319 in 24,474 households.
Dashti County's population history and administrative structure over three consecutive censuses are shown in the following table.
Dashti County is bounded by the Persian Gulf to the west, Tangestan County to the north and west, Dashtestan County to the northeast, Dayyer County and Kangan County and to the south, Jam County to the southeast, and Firuzabad County to the east. The county has a 25 km coastline along the Persian Gulf, with a climate that is mostly arid or semiarid. The highest point in the county is Mount Beyrami at 1,950 m. Petroleum, natural gas, lime, and stone from quarries are extracted in the county.
A strong earthquake measuring 6.1 on the Richter scale struck the city of Shonbeh and villages of Shonbeh and Tasuj District in Dashti County on 9 April 2013, killing at least thirty-seven people.
Wheat, tomatoes, corn, and other grains are grown. There is a local honey industry.