In this paper we use macroeconomic analysis with the aid of input-output analysis to show contribution and significance of energy sector for the Croatian economy. The macroeconomic analysis is based on data provided by the Croatian Bureau of Statistics and Croatian National Bank. The input-output analysis is based on the official input-output tables for Croatia. We analyse key macroeconomic variables, i.e. gross value added, employment, investment and trade balance. By using the input-output analysis we calculate the matrix of technical coefficients as well as the value added coefficients. We use these coefficients in order to establish value of energy sector production. By using the matrix multiplier we analyse multiplicative effects, both direct and indirect, and total import dependence of the energy sector. The conclusions point to limitations and shortcomings of using the input-output analysis and importance of the energy sector for growth and development of Croatia. The results of input-output analysis suggest significant multiplicative effects of the energy sector for the Croatian economy given relatively small portion in total gross value added.