The main purpose of the paper was to present changes in the concentration level of individual animal production in Poland. All Polish voivodships were selected for research purposefully. The research period concerned the years 2005-2019. The source of material was the literature on the subject and data from the Central Statistical Office. For the analysis and presentation of materials, descriptive, tabular and graphic methods as well as dynamics based on a constant basis, the Gini concentration factor and concentration analysis using the Lorenz curve were used. Specialization in animal production was found in several voivodships, such as Mazowieckie and Wielkopolskie. There were also voivodships focused on a given type of animal production, like Podlaskie on milk production. The concentration of animal production increased, which meant an even greater concentration of activities in several voivodships. The exception was sheep production, for which a decrease in the concentration of the sheep population and lamb production was noted. A reduction in the concentration of production also occurred in the production of veal meat. It should be noted that, as a rule, the dominant voivodships in given animal production increased the number of animals and the production of products obtained from these groups of farm animals the most.