At the time of the 2006 National Census, Delgosha's population was 3,931 in 676 households, when it was a village in Gachi Rural District of the former Malekshahi District of Mehran County. The following census in 2011 counted 2,201 people in 551 households, by which time the district had been separated from the county in the establishment of Malekshahi County, and the village had been elevated to the status of a city. Delgosha and the rural district were transferred to the new Gachi District. The 2016 census measured the population of the city as 1,819 people in 510 households.
↑Davodi, Parviz (c. 2024) [Approved 28 July 1387]. Approval letter regarding changes and reforms of divisions in Ilam province. lamtakam.com (Report) (in Persian). Ministry of the Interior, Council of Ministers. Proposal 91494/42/1/4/1; Notification 145145/T342H. Archived from the original on 8 February 2024. Retrieved 8 February 2024– via Lam ta Kam.