The main aim of this study was to determine the level of economic development of the counties and subregions of Masovian province in the years 2005 and 2014. The study used Hellwig measure of development. The obtained data show that the most developed counties were the cities at county rank, and the least developed were land counties in the southern part of the Mazovia province. The most developed were Warsaw subregions, and the least Radom and Ciechanów subregions.

The aim of this paper is to present the consumers cooperatives in Poland in the years 2006–2014 on the example of the selected cooperative being a member of the National Supervision Union of Spolem Consumer Cooperatives. To characterise the chosen cooperative, the number and area size of their business establishments were presented, as well as the number of employees and their wages. It was followed by the financial results of the business activity, the balance sheet and its components as well as the strengths leading to further development. Taking into account economic and financial performance of the cooperative, it was developing in the analyzed period.