Trowbridge is a census-designated place (CDP) in Sutter County, California.

[2] The 2010 United States census reported Trowbridge's population was 226.

According to the United States Census Bureau, the CDP covers an area of 6.7 square miles (17.5 km2), all of it land.

19 households (23.5%) were made up of individuals, and 9 (11.1%) had someone living alone who was 65 years of age or older.

There were 88 housing units at an average density of 13.0 per square mile (5.0/km2), of which 64 (79.0%) were owner-occupied, and 17 (21.0%) were occupied by renters.