Alpha Supported Living Services is a nonprofit agency providing supported living and group home services to adults with intellectual disabilities living in homes in King, Snohomish, and Spokane Counties. Alpha was founded in 1974 by parents of adults with developmental disabilities looking for an alternative to state institutionalization for their children. At the time, new models for services were just beginning; they named the first home after the first letter in the Greek alphabet in the hope that many similar homes would follow. Since that first home on Queen Anne, Alpha has expanded services to others wishing to receive community services and merged over the years with similar agencies to become the largest nonprofit provider of supported living in the state.