Shestak, NebraskaShestak is an unincorporated community in Saline County, Nebraska, United States. The community is located on Nebraska Highway 103 south of Crete. The Big Blue River flows past, approximately to the east of the community.HistoryShestak had a post office from 1893 until 1894. The community was named for Václav Šesták, an early settler and native of Bohemia.