Sumrakovac () is a village in the municipality of Boljevac, Serbia. According to the 2002 census, the village has a population of 642 people.Popis stanovništva, domaćinstava i Stanova 2002. Knjiga 1: Nacionalna ili etnička pripadnost po naseljima. Republika Srbija, Republički zavod za statistiku Beograd 2003. The village is situated in the Crna Reka region.
The village was a site of operations in the First Serbian Uprising (1804–13). The Crna Reka nahija was organized into Revolutionary Serbia, with a seat at Zaječar and the establishment of a magistrate (court). Eight trenches were built in the Crna Reka nahiya, one which was at Sumrakovac.
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