Countries: Sudan, Central African Republic, Chad, Egypt, Ethiopia, Libya, South Sudan Source: International Organization for Migration Please refer to the attached file. Overview:This report provides an overview of the total population of internally displaced persons (IDPs) in Sudan, including those displaced both before and after the onset of the conflict on 15 April 2023.The number of IDPs decreased by an estimated 13 per cent compared to highest-ever recorded population of IDPs in Sudan, as reported in Sudan Mobility Update (15) in January 2025. The decrease in IDPs is primarily due to increased return movements to Sennar, Aj Jazirah, and Khartoum states. For further information, see Return Monitoring Alert (4).Key Findings:As of 28 May 2025, an estimated total of 10,136,005 IDPs were recorded across 10,410 locations, in 185 localities, across all 18 states in Sudan.An estimated 7,730,552 individuals were displaced internally within Sudan since 15 April 2023.Approximately 4,138,165 individuals crossed borders into neighbouring countries since 15 April 2023.The top states of origin were Khartoum (30%), South Darfur (20%), and North Darfur (19%).The highest proportion of IDPs were hosted in South Darfur (18%), North Darfur (18%), and Central Darfur (9%) states.Over half (53%) of IDPs were reportedly children under the age of 18-years-old.Annex 1 includes an operational matrix with a table of estimated IDPs per state, disaggregated by displacement before versus after 15 April 2023.Note: The number of IDPs displaced post 15 April 2023 (7,730,552 IDPs) includes the estimated 1,415,319 IDPs who were initially displaced prior to 15 April 2023 and experienced secondary displacement since 15 April 2023.DTM Sudan defines an internally displaced person as any person who has been forced or obliged to flee from their habitual residence due to an event dating from 2003 onwards. DTM Sudan defines a returnee as a person who was previously displaced from their habitual residence within Sudan due to an event dating from 2003 onwards, and who has now voluntarily return to their location of habitual residence, irrespective of whether they have returned to their former residence or to another shelter type.