Internal population migrations present annual survey that covers basic demographic data on persons who moved from the actual place of usual residence to another place of residence within the boundaries of the Republic of Serbia. For collecting the data on persons who changed the place of residence, the competent body is Ministry of the Interior. SORS does not conduct the survey on international migrations. 

Immigration of foreign citizens is an annual survey that includes demographic data on persons – foreign citizens who have been issued a permanent residence permit or temporary residence permit for a period longer than one year. The Ministry of the Interior is responsible for collecting data on persons who have been issued a temporary residence permit or permanent residence permit.