A child seat assembly for use in a shopping cart and secured to the hinged rear gate of the shopping cart that is configured for lifting to expose a rear opening for nesting like carts. The child seat is secured in the lower one-third portion of the shopping cart rear wall height by hinged connections, such that the seat assembly is movable between a use and a non-use configuration, and the seat assembly is suspended in position by a strut member connected to the seat back and the rear gate at a position above the seat bottom.