An infant carrier holder has a floor with a ramp and sidewalls and is mounted to a shopping cart. The ramp and sidewalls can contribute to stably supporting an infant carrier. The holder serves as a mechanical interface between an infant carrier, which can be received in the holder, and the shopping cart. The holder can be concavely shaped to assist in shopping cart nesting in addition to supporting a received infant carrier at a desired angle. The holder can be adjustably mounted to a gate or a basket of the shopping cart and may/may not interfere with nesting operations. The holder permits an infant carrier to be supported on a shopping cart without using a significant amount of shopping cart space or interfering with nesting operations.