Homelessness in today's urban centers poses a problem of huge proportions. Increasingly, the homeless and the urban dilemma are intertwined. Cause and effect are blurred as the needs of the homeless confront and affront while shaping urban policy. Because of the diverse nature and needs of the American homeless population, individual organizations are not able to provide the range of services necessary for survival on the street and long-term recovery off the street. The authors present a grounded theory study of coordination and communication in the provision of service to the urban homeless. They begin by reviewing theoretical perspectives on communication and coordination in interorganizational relationships. They then consider this literature in light of the urban homelessness context.