Grayson is an unincorporated community in Stanislaus County, California, United States.

For statistical purposes, the United States Census Bureau has defined Grayson as a census-designated place (CDP).

[3] Grayson, a native of Louisiana, brought his family to California in 1846, and was active in the Mexican–American War.

He was a self-taught watercolor painter and an authority of Pacific Coast birds.

According to the United States Census Bureau, the CDP has a total area of 2.5 square miles (6.5 km2), all of it land.

22 households (8.8%) were made up of individuals, and 6 (2.4%) had someone living alone who was 65 years of age or older.

There were 280 housing units at an average density of 109.9 per square mile (42.4/km2), of which 161 (64.4%) were owner-occupied, and 89 (35.6%) were occupied by renters.

8.8% of all households were made up of individuals, and 4.0% had someone living alone who was 65 years of age or older.

[11] The groundwater is polluted by nitrates so it is treated by ion exchange before being used as drinking water.