The study examined the effect gas flaring on agricultural output in Delta State, Nigeria. The agricultural output consists of cassava, yam and pepper. Likewise, farmers’ income was included in the model as a control variable. The study relied on primary data through collection of questionnaires using simple random sampling of 800 respondents. Two gas flare stations located in Sapele and Oghara were used for the study. The targeted respondents provided information of the yields of crops on 200, 400 and 600 kms away from the flow stations. The information was processed, classified and econometric technique was utilized to explore the relationship. Accordingly, the study found that gas flaring had significant negative effect on all three agricultural output. Therefore, it was recommended that government put in place necessary and effective polices to eliminate gas flaring or even reduce it to the barest minimum.