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This paper presents the influence of interference phenomenon on bearing capacity of closely constructed footings over reinforced soil. The behavior of neighboring footings is strongly affected by the distance between each other in comparison with the case where the same isolated footing is constructed. The use of geosynthetics to improve the bearing capacity and settlement performance of footings has proven to be a cost-effective system. In this study, bearing capacity of interfering strip shallow footings over geogrid-reinforced sand has been investigated. The model and correlation parameters for quantifying of the bearing capacity for different interfering footings on reinforced sand were derived, and model accuracy has been controlled by comparing experimental and theoretical results. Also an artificial neural network (ANN) model for interference factor is presented. The results show that there exists a significant improvement in the behavior of interfering footings reinforced with geogrid layers.