The establishment of the local self-government system was introduced by the Constitution of the Republic of Croatia, which guarantees citizens the right to local and regional self-government and is more closely regulated by the Law on Local and Regional Self-Government. Units of local self-government are municipalities and cities, and units of regional self-government are counties. By dividing the state territory into smaller units the division of the local and regional self-government units is conducted, resulting in integration of local government work. By studying the organizational forms of the local self-government system, we primarily notice the degree of local and regional self-government. The municipality of Antunovac is a municipality in the Osijek-Baranja County of the Republic of Croatia. The sphere of self-management units can be on two sides, jobs entrusted by the state administration called transferred jobs and their own or original affairs. The Municipality of Antunovac as well as all units of local and regional self-government in the Republic of Croatia have an internal structure established by three bodies: the representative body (municipal council, city council, county assembly), executive body (mayor, mayor, prefect) and administrative body (administrative departments and services). The establishment of co-operation or the conclusion of an agreement between the state administration and the local and regional self-government ensures even better performance of tasks relevant to local self-government by which citizens exercise their right to participate in the management of public affairs. Citizens of local units face daily problems and events with their local community, and can participate in decision-making processes. Citizens can directly participate in decision-making on local affairs by referendum, local committee, and local assembly of citizens. Regardless of their capacities and the size of the local self-government unit, they are fulfilling their goal of performing local affairs, which is to meet the various needs and activities of citizens, which contributes to the improvement of their quality of life in a particular unit and the fulfillment of conditions for the more successful economic, social and other progress.