Performance measurement is of fundamental importance in all sectors of the national economy. However, this is especially true for agriculture because more efficient management is becoming increasingly important in this sector as well as well to supply the population with adequate food. The study examines the performance of Romanian and Hungarian agricultural companies. A total of 5,390 companies were selected for the analysis database, of which 3,789 were Romanian and 1,601 were Hungarian. In the performance analysis, the companies’ efficiency was examined between 2018 and 2020 using the Data Envelopment Analysis method. Based on the results, it can be concluded that the Romanian agricultural companies operate with statistically significantly lower efficiency than the Hungarian ones. However, it can also be concluded that the average efficiency of enterprises is very low in both countries. The performance is low, even considering the averages of the sub-sector efficiency coefficients. There is no year when the average efficiency ratio in any sector exceeds 50%. On the other hand, the sub-sector analysis of Oilseeds and Cereals shows that, especially in Romania, the proportion of companies with an efficiency coefficient below 50% is very high. Similar conclusions can be made regarding the poultry and egg production subsector. Further research is needed to reveal the reasons more precisely for the low efficiency of agricultural companies.