Lamorinda is an area within Contra Costa County, California in the United States. The name is a portmanteau derived from the three cities that make up the region: Lafayette, Moraga and Orinda.
The public high schools in each of the cities are part of the Acalanes Union High School District, one of the highest-ranked high school districts in California.
With a cluster of restaurants and generally high-end shops in its downtown, Lafayette is considered the retail hub of the region. Orinda is home to the historic Orinda Theatre and the California Shakespeare Theater. Moraga is home to Saint Mary's College of California.
Transportation
Lafayette and Orinda are located along Highway 24, with the Bay Area Rapid Transit (BART) running in the highway medians and stations at both and . Line 6 of the Contra Costa County Connection runs through the three cities. Moraga, located to the south, is more isolated with only a pair of two-lane roads connecting it to Orinda and Lafayette as well as to Highway 24 to the north. Additionally, internal roads link Moraga to downtown Walnut Creek, while another set of two-lane roads connects it to Oakland hills and Castro Valley.
Central county
Lamorinda is located in the western part of Contra Costa County, California. The central part of the county is a valley traversed by Interstate 680 and Highway 24. The towns to the east of the hills, situated on or near Highway 24 and their surrounding areas (Lafayette, Moraga and Orinda) are collectively known as Lamorinda. The major central county cities along Interstate 680 include Martinez, Concord, Pleasant Hill, Walnut Creek, Danville, San Ramon, and unincorporated Alamo.