The authors study the influence of digital marketing on the efficiency of the agricultural sector of the economy. The authors chose the systemic approach as the leading approach to study the problem. The chosen approach allows the authors to scientifically substantiate and solve the problems of studying the agricultural sector as a voluminous and complex functioning system. The research revealed that agriculture in Russia is characterized by a lower level of digitalization compared to European countries and other sectors of the national economy of Russia. Currently, the picture is being smoothed by the active development of digital technologies, including digital marketing. Using variance analysis, the authors revealed the relationship between the costs of innovative activities in the field of marketing and the indicators of revenue, profit, and profitability of product sales in the agricultural sector. As a result, the authors developed recommendations for implementing digital marketing. The developed recommendations will reduce unproductive costs and increase the efficiency of the agricultural sector.