Ervenik is a village and municipality located in the Šibenik-Knin County of Croatia. As of 2021, the municipality had a total population of 826 inhabitants, while the specific village of Ervenik recorded a population of 243.
The municipality is notable for its demographic composition; in 2021, 97.19% of its residents were Serbs. This figure makes Ervenik the municipality with the highest percentage of Serbs in Croatia.