Before the war, Sapna had a population of 13,500, with a density of 114,4 people per km². It is not known exactly how many people live now in the town and the municipality of Sapna since there has not been a census since 1991.
Before the Bosnian War, Sapna was part of the Zvornik municipality. But, as a result of the Dayton Agreement, the Zvornik municipality was divided between the two entities, Federation of Bosnia and Herzegovina and Republika Srpska, so Sapna became a municipality itself, comprising the portion of Zvornik municipality that remained in the Federation of BiH. Sapna officially became a municipality on March 8, 1998.
