Silvana is a rural community and census-designated place (CDP) in Snohomish County, Washington, United States.

[4] The main channel of the river passes to the north of the island, while South Slough to the southwest and Cook Slough to the southeast also form the general boundaries of the community.

[5] According to the United States Census Bureau, the CDP has a total area of 1.5 square miles (4.0 km2), all of it land.

The racial makeup of the CDP was 93.81% White, 2.06% Native American, 4.12% from other races.

15.8% of all households were made up of individuals, and 5.3% had someone living alone who was 65 years of age or older.