Green Valley is a census-designated place (CDP) located in Solano County, California, United States.

On April 29, 1865, rebel sympathizers in the town started "rejoicing over the death of President Lincoln."

When news reached Benicia a company of militia was sent to stop these acts of celebration.

After several shots the sympathizers surrendered to the militia ending the short battle.

[7] According to the United States Census Bureau, the CDP has a total area of 8.3 square miles (21 km2), 99.98% of it land and 0.02% of it water.

2020 The 2020 United States Census reported that Green Valley had a population of 1,654.

The 2010 United States Census[9] reported that Green Valley had a population of 1,625.

108 households (15.9%) were made up of individuals, and 61 (9.0%) had someone living alone who was 65 years of age or older.