Mountain View is a census designated place (CDP) in Contra Costa County, California, United States.

According to the United States Census Bureau, the CDP has a total area of 0.3 square miles (0.75 km2), all of it land.

As of the 2020 census[7], there were 2,622 people living in 864 households in Mountain View.

The 2010 United States Census[8] reported that Mountain View had a population of 2,372.

The racial makeup of Mountain View was 1,896 (79.9%) White, 60 (2.5%) African American, 30 (1.3%) Native American, 70 (3.0%) Asian, 20 (0.8%) Pacific Islander, 155 (6.5%) from other races, and 141 (5.9%) from two or more races.

241 households (25.7%) were made up of individuals, and 44 (4.7%) had someone living alone who was 65 years of age or older.

As of the census[9] of 2000, there were 2,468 people, 959 households, and 589 families residing in the CDP.

27.3% of all households were made up of individuals, and 6.5% had someone living alone who was 65 years of age or older.