 Liberty Lake is a freshwater spring-fed lake, that allows boating, swimming and fishing.The Census Bureau's 2006-2010 American Community Survey showed that (in 2010 inflation-adjusted dollars) median household income was $74,671 (with a margin of error of +/- $7,953) and the median family income was $97,774 (+/- $17,454).Males had a median income of $62,215 (+/- $5,997) versus $57,917 (+/- $10,212) for females.