Agnew, NebraskaAgnew is an unincorporated community in Lancaster County, Nebraska, United States. The population was 30 at the 2020 [United States census|2020 census].HistoryA post office was established at Agnew in 1886, and remained in operation until it was discontinued in 1978. The community was named for William James Agnew, a railroad official. Agnew was platted in 1889.