Resident Population in Onslow County, NC was 213.67600 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Onslow County, NC reached a record high of 213.67600 in January of 2023 and a record low of 93.20000 in January of 1973. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Onslow County, NC - last updated from the United States Federal Reserve on May of 2024.