Population migration is a major factor that affects the number and structures of the population both for the country as a whole and for individual regions and territories.
As of September 7, 2021, 395 690 persons declared that they had changed the place of their habitual residence within the country during the period 2011 - 2021. Migrant women are 213 558, or 54.0%, and men - 182 132, or 46.0% of the migrated persons.
As of September 7, 2021, 354 138 persons declared that they resided outside the country for more than one year during the period 1980 - 2021 and returned or arrived in the country during the same period.
Bulgarian citizens who returned to the country during the observed period are 314 285, or 88.7% of all who indicated that they had resided abroad. Men are 164 833 (52.4%), and women - 149 452 (47.6%).