State authority in Republic Croatia established is on principle trodiobe authority on legislative, executive and judicial, and limited Constitution guaranteed right on local and regional self-government. Units regional self-government are counties, unit of local selfgovernment are cities and municipality, and their area determines on way prescribed law. Unit regional self-government do works from regional meaning just as are works school system, economic development, spacious planning, health system, traffic and crowded infrastructure, while unit of local self-government do works from local meaning, and particular works primary medical defended, social care, upbringing and primary education, arrangement settlement and housing, technical culture, physical culture and sport. Inner constitution units local and regional self-government consists from representative body, executivebody and managing bodies.