The carbon footprint of crop production on the lands of agricultural enterprises in Ukraine under crops of wheat, maize, sunflower seeds, rapeseed, soya beans, sugar beets, potatoes and vegetables was determined using the UN IPCC methodology. An increase in the carbon footprint of crop production in Ukraine during 1990–2021 was revealed, which is associated with a high level of nitrogen input from mineral fertilizers to the soil and mineralization of humus. In Ukraine, during 1990‒2021, a high level of humus mineralization was observed on the agricultural lands under crops of wheat, maize, sunflower seed, rapeseed, soya bean, sugar beet, potatoes, and vegetables ‒ 8‒1998 kg/ha/year with emitted into the air from 0.2 to 63.0 Tg of CO2/year. The average CO2 emissions from agricultural land per 1 Mg of main production of studied crops of Ukraine during 1990‒2021 are 46‒1109 kg and N2O emissions are 33‒452 kg CO2-eq., respectively. Among the studied crops, the highest emissions of CO2 per unit of production due to the mineralization of humus are for the cultivation of sunflower seeds ‒ 1109 kg/Mg/year, maize ‒ 868 and rapeseed ‒ 531 kg/Mg/year, and the lowest emissions for the cultivation of vegetables ‒ 46 kg/Mg/year (2021). The highest N2O emissions from agricultural land per unit of production for the cultivation of rapeseed ‒ 452 kg CO2-eq./Mg/year, sunflower seeds ‒ 368 and soya beans ‒ 300 kg CO2-eq./Mg/year, and the lowest emissions for the cultivation of vegetables and sugar beet ‒ 33 kg CO2-eq./Mg/year (2021). According to the prognosis, this tendency will lead not only to an increase in GHG emissions, but also to soil depletion and a decrease in the country's food security. By 2035 the average level of humus mineralization will be about 2200 kg/ha/year (R2 = 0.725), CO2 emissions per unit of the main production of crops will be about 800 kg of CO2 per 1 Mg of production per year (R2 = 0.657) and emissions of N2O from agricultural land per 1 Mg of main production of crops will be about 200 kg CO2-eq./year (R2 = 0.0591).