Poulsbo ( PAWLZ-boh) is a city on Liberty Bay in Kitsap County, Washington, United States. It is the smallest of the four cities in Kitsap County. The population was 9,200 at the 2010 census and an estimated 10,927 in 2018.The area was historically inhabited by the Suquamish people, many of whom moved to the Port Madison Indian Reservation after the signing of the Treaty of Point Elliott in 1855.