Carmet is a census-designated place (CDP) in Sonoma County, California.

According to the United States Census Bureau, the CDP covers an area of 0.3 square miles (0.7 km2), all of it land.

The racial makeup of the CDP was 91.5% White, 2.1% Asian, and 6.4% from two or more races.

15 households (51.7%) were made up of individuals, and 4 (13.8%) had someone living alone who was 65 years of age or older.

There were 68 housing units at an average density of 237.2 per square mile (91.6/km2), of which 82.8% were owner-occupied and 17.2% were occupied by renters.