Data Envelopment Analysis is one of the quantitative methods in economics used more broadly during last years. This is nonparametric method which allows to make an estimation of the efficiency of the organization without having financial data. Authors decided to use this method for validation of the efficiency of the Polish wholesale markets. The National Development Program of the Wholesale Markets expected that all markets will have the same possibility to be efficient. It seems that the development of wholesale markets is varying. To check this hipotheses authors have chosen as an input: area, building area while as an output have been chosen: sales volume per year in tones, the number of traders and the number of producers.