Alum Rock is a census-designated place in Santa Clara County, California, United States. It is located in the San Francisco Bay Area and is part of the East San Jose region. The population was 33,121 at the 2010 census.

Alum Rock is a predominantly Hispanic community with a wide range of restaurants and small businesses. It is home to the oldest Mexican restaurant in the area, La Victoria. The community is also known for its many parks and outdoor recreation areas. Alum Rock Park is the largest of these and is home to a variety of wildlife, including bobcats, coyotes, and deer.

Alum Rock is a great place to live for those looking for a diverse and welcoming community. The neighborhood is known for its friendly atmosphere and active community events. It is also home to some of the best schools in the area, including the Alum Rock Union School District and the East Side Union High School District. With its mix of culture, outdoor activities, and educational opportunities, Alum Rock is a great place to call home.