Resident Population in Keith County, NE was 8.14800 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Keith County, NE reached a record high of 9.36400 in January of 1980 and a record low of 7.76200 in January of 2009. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Keith County, NE - last updated from the United States Federal Reserve on April of 2026.