Resident Population in Kitsap County, WA was 277.65800 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Kitsap County, WA reached a record high of 277.67300 in January of 2022 and a record low of 101.60000 in January of 1971. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Kitsap County, WA - last updated from the United States Federal Reserve on May of 2024.