Međimurje County, because of its relatively developed agricultural production has a great potential to collect and utilize agricultural residues in energy production. Instability of prices of energy-generating products, together with increase of ecological awareness, make renewable sources and, therefore, agricultural residues, more and more interesting raw material for energy production. The aim of this work was to determine the theoretical potential and availability of post-harvest residues under sustainability conditions in the agricultural sector in the Međimurje County area. Availability of agricultural residues makes it possible to estimate the amount of biomass, needed for energy production in the research area. The calculation includes the following agricultural crops: corn, wheat, barley and rapeseed. The results show that there are 22,846 tonnes of residues after corn production, 5,285 tonnes of residues after wheat production, 2,853 tonnes of residues after barley production and 2,686 tonnes of residues after production of rapeseed available in the County, for energy production.