Terminous is a census-designated place in San Joaquin County, California.

[2] Terminous sits at an elevation of 7 feet (2.1 m) below sea level.

[2] It is located on the Terminous Tract, an island of the Sacramento–San Joaquin River Delta.

The 2010 United States census reported Terminous's population as 381.

[5] According to the United States Census Bureau, the CDP covers an area of 1.0 square miles (2.5 km2), all of it land.