InterWest is a regional insurance agency consisting of Northern and Central California's most prestigious independent insurance firms. With more than $425 million in premiums purchased on behalf of our customers every year, and representing over 75 insurance companies, we have a unique ability to offer a full range of business and personal insurance products. InterWest Insurance Services, Inc. also offers a number of customized insurance and business management services. We have a partnership in the future growth and financial care of our clients.