Muscoy is a census-designated place (CDP) in San Bernardino County, California, United States.

Muscoy shares ZIP code 92407 with the communities of Verdemont, Devore Heights, Rosena Ranch and Arrowhead Farms in northwestern San Bernardino.

Residents enjoy a semi-rural setting with large lots where they can raise horses and other livestock, nursery plants, and fruit trees.

For this reason, much of Muscoy is included in the county Additional Agriculture (AA) overlay, which specifies the types and quantities of animals that may be kept on each parcel.

[4] A distinctive feature of Muscoy life today is motor vehicles and equestrians sharing the roadways.

After World War II, population growth accelerated and the area began a transition from agricultural use to a more suburban residential character.

This resulted in more shops opening up to serve the needs of travelers, and more people establishing permanent residences around the Muscoy area.

[8] According to the United States Census Bureau, the CDP has a total area of 3.1 square miles (8.0 km2), 99.87% of it is land and 0.13% is water.

According to the 2010 United States Census, Muscoy had a median household income of $39,239, with 33.0% of the population living below the federal poverty line.

[14] The US Department of Labor operates Inland Empire Job Corps Center, where young adults can complete high school and learn a career or trade.

The Muscoy MAC currently meets on the third Tuesday of even-numbered months at County Fire Station #75, at 7:00pm.

An informal group, Concerned Citizens, meets on the first Friday of each month at Muscoy United Methodist Church to discuss quality-of-life issues for formal presentation for action by the Board of Supervisors.