Negoslavci is a village and a municipality in Vukovar-Syrmia County in eastern Croatia. It is located south of the town of Vukovar, seat of th…Negoslavci is a village and a municipality in Vukovar-Syrmia County in eastern Croatia. It is located south of the town of Vukovar, seat of the county. Landscape of the Negoslavci Municipality is marked by the Pannonian Basin plains and agricultural fields of maize, wheat, common sunflower and sugar beet.