The subject of this final work is the organization of the state administration in the Republic of Croatia. The proper organization of state administration ensures effective implementation of laws and bylaws, and nowadays conditions for effectiveness are created if the state administration itself in line with European and international standards which are in the Republic of Croatia is given much attention. The internal organization of state administration in the Republic of Croatia prescribed by the Government. Every government body to analyze this to get a deeper insight into the whole essence of the problem of the state administration. The study included all available and relevant sources and in their processing used several methods. All the research is divided into theoretical and practical part. The theoretical part deals with basic aspects of the organization of the state administration, ie. The modernization, standardization, authorities and principles while the practical part of the research carried out by the state administrative office in Slavonski Brod, i.e. the practical example to investigate everything that is presented theoretical part.