The objective of the study was the analysis of changes in the development of organic farming in Poland over the period of 2004-2018. The results obtained indicate that following the accession of Poland to the EU organic farming in the country developed dynamically. However, since 2014 the situation has changed and a decrease in the number of organic farms has been noted for the first time. The area of arable soils during the conversion period decreased over the years 2012-2015. As a result of that, the area of arable lands in organic farms with certificates began to shrink since 2015. Within the period under analysis a change of area structure of organic farms took place. Hence, in the years 2016-2018 a high percentage was constituted by farms with areas of 10-20 ha and 20-50 ha, the share of small and very small farms being also significant. The Polish production of organic produce is diversified regionally, which is well illustrated by the latest data from the individual provinces. In terms of the total number of organic farms, the Warmińsko-mazurskie and Podlaskie Provinces are outstanding. The largest total area of lands under organic farming is to be found in the Warmińsko-mazurskie and Zachodniopomorskie (West Pomeranian) Provinces.