San Marino is an idyllic community, intentionally designed to be residential, with single-family homes built on large lots with wide streets. Those guidelines, established in 1913, are still adhered to today. In the center of San Marino, Lacy Park is 30-acres of open space featuring a rose arbor and an extensive arboretum of trees. The San Marino School District was ranked #1 in California out of 400 counties by the California Assessment of Student Performance and Progress in 2016.
San Marino is home to The Huntington Library, Art Collections and Botanical Gardens.