Liberty Lake is an incorporated city in Spokane County, Washington, United States, on the Idaho state line. Liberty Lake is a suburb of Spokane, Washington. Thus, it is situated between Spokane and Coeur d'Alene, Idaho. The population was 4,660 at the 2000 census. Liberty Lake was named after an Etienne Edward Laliberte (A French Canadian-1871), later he changed his name to Steve Liberty, a mail carrier and homesteader by the Lake. Based on per capita income, one of the more reliable measures of affluence, Liberty Lake ranks 42nd of 522 areas in the state of Washington to be ranked. It is also the highest rank achieved in Spokane County.